Malicious PDF — malware analysis report

Static analysis result for SHA-256 5994d899e4b6ad6d…

MALICIOUS

PDF

69.8 KB Created: 2021-01-11 16:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c636378388495cdc14e3fb214a2e7c39 SHA-1: f88da2f45705554864c00852106d832debbd2cef SHA-256: 5994d899e4b6ad6d0fbd7da9a4335f91f938fb4433feeef5ca526716c1336955
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to 'traffine.ru', a known malicious redirector, which likely serves as a lure to download further malicious content. The document body, though heavily obfuscated, contains text related to scanning apps, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/wb?keyword=my%20scans%20best%20pdf%20scanner%20app In PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/torinuvewi_wevikuwaramux_xoruvukatageto_zidapinafi.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/72a232.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/7d7e75713a1490.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/808555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5ffba0e25b571.pdfIn PDF document text
    • https://site-1197643.mozfiles.com/files/1197643/paper__io_2_cheat_code_2020.pdfIn PDF document text
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/vuxiratoteruxovisim.pdfIn PDF document text
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/xopakikopotalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/zejesexisem.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/letter_of_intent_cover_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/29675707174.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/41318896440.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/gilalopefezedilofubire.pdfIn PDF document text
    • 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_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 5364 bytes
SHA-256: 3bb3e78814df48665b7c01e484a0d5c9da8e512b945d338e813c7942d7c6070a
font_01_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 10612 bytes
SHA-256: 54c3ce3acca7b165d8d10941c06d052fecb3a418533743db3df6e3ba6a2cdf25

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