Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b4aa2b09d938e7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 08:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 72997015fe3305562cf509f92bf7e0ae SHA-1: ab09de93e860ebba7a24cfa3f6cbe20a331a493e SHA-256: 01b4aa2b09d938e7307a10c0a9066a209339c7725073e464d430381b3c75f55a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, including one pointing to a raw IP address, indicating a likely attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://interreg-ipa-husrb.com/downloads/86853747061.pdf In PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/9c8c8adda12a260d5e51526336db35bc/bogixudewefa.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/59135032594.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ae93cdd0---jawixavuposojeze.pdfIn PDF document text
    • https://norservis.info/files/files/gesem.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608297e7077d6---37808760247.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/d633836f01e7092d772a9f8f01ea41bc/gudotobetojopezowazagapan.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe76d348bd8---5808138153.pdfIn PDF document text
    • http://blueyee.com/upload/file/211523103365.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160918d106a526---tenexapopunujedo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/aijg9ubmrerm6a35q2ivm8berj/nusagaravukewekoto.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/e4lnev43insut5liepbncllupd/32803331319.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/pq9eocld0n1og517tque58f89q/gipidarere.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/munonudijivulunog.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8ecc6025c33b6ea4afac2e3096220e52/wigasok.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/20218242352564691.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910b4885326---72736737837.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/94778239345.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e25313e394---67143387454.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/83706ee95cb87667e0192158a2e03f6c/38679257663.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/buxolopag.pdfPDF link annotation
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vekitomeketoluweton.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/vadevawifupaxagigotom.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/96106753143.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=leapfrog+leapster+explorer+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_off0000d799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 17860 bytes
SHA-256: b10fde2c968f93bc5f9103d53bb857b3faf2f50c73e07b0e25fe1bd3f801dbac
font_01_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 10768 bytes
SHA-256: d49cd397f67a0cbdd3474d379c1213e29722665c2fb51ed3a4b64f711811b8d4
font_02_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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