Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2d27f8ded83222…

MALICIOUS

PDF

69.8 KB Created: 2021-10-01 19:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bdefd43e3b663a6be76c45b98f8211fc SHA-1: 6eedd8b67d8b8994bcc27ce505b5c7ce627cd07b SHA-256: de2d27f8ded83222cf2d43a8d55630a374dc087ad1845c12abf4f699a0a663f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://hisunnychem.com/upload/files/13155171435.pdf In PDF document text
    • http://vlajamo.cz/images/file/5279741866.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/62893530857.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/74035752124.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/lf485bf3a7qjd7354els2la864/kazaladeregeritedonavadi.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/35039991350.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/zumebizabusovesedunav.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153cdf01219d---6196861399.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/latagukedabibowosugitotew.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210919171203007.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/90527144390.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/72370263768.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/sigonajolu.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/65187332187.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/78221839280.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/xopinevapipoforivow.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/32350281263.pdfIn PDF document text
    • http://twatpchome.touchance.com/userfiles/file/37402215204.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///pezetuzizurejazome.pdfIn PDF document text
    • http://gewald.ru/content/Files/virafodopagi.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/41784867371.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091122240573499.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ee9807418e6ff1ede0ca40866cdc99e9/zosedewokuz.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/2904548456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+use+phone+as+emulator+in+android+studioPDF 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_off0000b045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB045 10836 bytes
SHA-256: 580bb3af15faea13e36ca6cbe49da97a6efdb2763e5dfc1b3967d55b321053e0
font_01_sfnt_off0000c90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 15856 bytes
SHA-256: dc5f173d0066c319f103e4c7749078b21560589562da54f4af9ab30cf3331012
font_02_sfnt_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1