Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f852639f1067985…

MALICIOUS

PDF

71.2 KB Created: 2021-05-26 00:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a9e8f2622c61c796679d6e0f92a43f0 SHA-1: f82c4ab1ef2bb33d83c4ba84dd4aa93b9f00b14b SHA-256: 6f852639f1067985937851d2fb80def9ae832e5ea55ae1bc818f73b6f0346fea
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF is flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document contains numerous links to external PDFs hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0a615e079ad9172ce79b2e095dde3f9b/xagikofesiwidinefelajuwo.pdf In PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f8ab39e60a41f73909167877e7339c46/rilurenedisazaxoneg.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f19093f9---52115436589.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/1rmvvckpbh8jeqbkk6bho6bsao/vubetapitidifex.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/majatixovunudukabobosoto.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ech0vaak757bmpiulenq0sd3j7/90479950676.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/vmuu09opqhfukko5btgga8omcf/56652778638.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a81d5d4f68---revigi.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zexurupugegelononulabule.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3e527c2a---mosufero.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/3qpj2uce9mjihu41d8jdi763n8/45776210730.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd51c5e65---moferoluvi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/aad7233b433666df4f87052d01642a93/53585119686.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca675345b8---28666764121.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8f7u05egkuc99pfcl5mr9a7qij/86317245249.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/56794515d8f202554e082921a504186f/mojinureke.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/49773ae4fe34cee4b83d1b68601e9b9b/18525848071.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4147015c1---mikeneg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ca+notary+public+exam+study+guidePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 5608 bytes
SHA-256: 5697c7af5b6a8862b531622276fd5fadcd1dbd79c997fac946b79561bb87e61a
font_01_sfnt_off0000e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 11764 bytes
SHA-256: e1dc49a0f2f7d67649a3c15ea4c3d50729a5f8b6df97573e47cd1718e567726c

Open this report in the interactive analyzer, or submit your own file for analysis.