Malicious PDF — malware analysis report

Static analysis result for SHA-256 d611090d7042e206…

MALICIOUS

PDF

90.9 KB Created: 2021-06-26 10:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2da82c63572ef8c2303793511b410ab5 SHA-1: 2c3f9088b255ceacb7a615939fa071021c14f70c SHA-256: d611090d7042e206c684f670cdbc6ac8afdcae05cd039b91578d69546f9422a9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting it functions as a link farm to distribute phishing content or malware. The presence of these links and the overall structure indicate an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://pistant.ru/uplcv?utm_term=iphone+answers+on+speakerphone
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/84fd861725989eda767b3c50cd7d6e9e/dilosugivat.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/04d3e00fc5ca3154a85ef6c400af9223/86883705636.pdf
    • http://pphu-joanna.pl/fckpliki/file/xuxefaxekegelapabenuv.pdf
    • http://hoshitorionline.com/uploads/files/17252815258.pdf
    • https://damsindia.org/admin/uploads/file/72735644740.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/134083d13773c4911e95536ee3b664b5/74317959114.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/fubogokomawatu.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/caf2d4b90ff63c652d92fea4dde61eb6/31295586557.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a287184540---rujidag.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607002de16f29---namarokipobi.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b40b7e853e9---10271023523.pdf
    • http://chothuexehochiminh.com/userfiles/file/bakafum.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c324e29415f---51471771841.pdf
    • http://haphadoor.com/upload/files/76368452820.pdf
    • https://fotofidelity.cz/userfiles/file/23017037531.pdf
    • http://kardelendalgicpompa.com/uploadfiles/file/lodisa.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bdf0e442ac210b40d660657461fd0eb9/davemukotenopepadisobil.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/c5cf14a0463624fae3e9a9d5b9dfedfe/32584447313.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/l49g5saeksdehd1eep1th1ct42/fowiwedegelasetizaresu.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/ruxuj.pdf
    • http://zhengfutz.com/v15/Upload/file/2021516211226579.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160831b79b9890---zufewusoxiduselopukuwo.pdf
    • http://ngocvietbungalow.com/upload/files/soxuli.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac63dab9c---63392167373.pdf
    • 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_off0000ff84.bin
5e84acebc292a42948625e355ef8a495c3e345b2610a94b962b4315e6b095e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 18068 bytes
font_01_sfnt_off00012f2c.bin
51e2e2bdc76cb26c89e09e8960bb534fdeaedfcc5d36070003e3da84b40d8220
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2C 10240 bytes
font_02_sfnt_off00014632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14632 16792 bytes