Malicious PDF — malware analysis report

Static analysis result for SHA-256 632c9d044d8540bb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-04 18:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1e45175b94f19c5a09084d7c8373a83f SHA-1: cafa014a332610f5e85b5146be5ca22a12fe8b4f SHA-256: 632c9d044d8540bb9c7200ee7b6bccb461d6ed92f7de626559d373885639694d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to external resources, with several identified as being hosted on compromised CMS uploads or disposable hosting. The heuristic 'PDF_RANDOM_URL_LINK' specifically highlights a link to 'http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/zujebofenuwezaligije.pdf', indicating a likely attempt to direct the user to malicious content. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or scam pretext, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://nebovsem.ru/app/webroot/files/files/nudixuwadulubuvedi.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f378cbf358---mudukokuruxizeronunarajod.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nihupsud6gkqg88e9dpgi7dk1j/lilovusopidal.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/69221221884.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/33892359983.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/39239186177.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e6a7f5b5459f1f66982a03b43271af1c/tovunagiruworenosezezonol.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/mejowadujon.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/adijt30oqjktj1olstptb2ruff/84062248567.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/zujebofenuwezaligije.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/gegakitewobivogax.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/1a18201739caec8ce30597df26541702/xesadimiwuzaga.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/sesoromibefige.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/3vlbgfrfd92dnrm7u5rhm0f2p3/puwexo.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210513060743.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d0b0b2e26---98906014781.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/36550746860.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/18503215848.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/digasalanodedopij.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/50425095223.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/cl92f2fi3k1tpnbk143ve07sjq/wanogazika.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/68891218753.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/55918771793.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/ef9566bb3cbc9230f351c8adccfb2bb6/62198977954.pdfIn PDF document text
    • https://istanajp.com/contents/files/36031560575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=digital+timer+plug+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 16624 bytes
SHA-256: abf471fde584b0e3a528f3d157f1edfd507d20e7a169870f6fbf1e61f4dc1194
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 10408 bytes
SHA-256: 4e4448eb00edc320a5cf14a91f70e886f0487f232afdeeb768d44d2d841796bb
font_02_sfnt_off00011b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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