Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e010ee8edbdac9c…

MALICIOUS

PDF

88.3 KB Created: 2021-07-12 17:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d347ea0a75ec61ad1b5ae45432691e0 SHA-1: dcde79344c0ff9d59561f693b4d4dab0764a0bd6 SHA-256: 4e010ee8edbdac9ca0975cb8acc3ccbf91489ab0799a7df2d57311e49c0ac078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://seanmore.com/userData/board/file/dujugurezidul.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/537e6a4223bfad894a986bcc965ac282/98329564455.pdf
    • http://houstontca.org/Content/uploads/files/rovinupafomajabejegeka.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc540dd243---94514759945.pdf
    • http://micronforgacsolo.hu/UserFiles/file/pakarigenokobebo.pdf
    • http://614move.com/clients/4890/File/97380249109.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757fa1cd891---nozarimufawu.pdf
    • http://sinhorelli.com/userfiles/file/79174012014.pdf
    • http://poltinka.ru/userfiles/file/wumitake.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075668795257---mipikanosikojez.pdf
    • https://egokituz.eus/files/galeria/files/wafonujuwasutaxadopowiwan.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/vt3s49t42o28q72092egldh3c7/43949486781.pdf
    • http://eraucheta.ru/uploads/file/makuxewevaku.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d04911f1f88f212fe01af91eee0ad208/15633427465.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e1dbc8c3b27---rebagetonebisojitekeputa.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2n4vf3hf33on3nen9p6bcr5u21/54677532950.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f42e30114b---robefatifuzumipoga.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c710d08b129---46664526517.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/q5d15gmb3uk7ouaba0jgcfk5lu/limamebemomirowutapus.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/egc7qatoaujgtdvbd3j19msd67/muxosaxiz.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d928ac2cdb---sobepu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+term+ischemia+is+defined+as
    • https://medlineplus.gov/ischemicstroke.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 16792 bytes
font_01_sfnt_off00010ec3.bin
839440b346dbb92944daeffafd9c729799b5b5c4bcad038f717f69e8d0853e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 10536 bytes
font_02_sfnt_off00012699.bin
5dfab123b5146587aaf668a26ffc82315e953ffef28928360ac868b1147b538f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 17332 bytes