Malicious PDF — malware analysis report

Static analysis result for SHA-256 8663d175252ea02d…

MALICIOUS

PDF

69.4 KB Created: 2020-12-01 07:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dcfaeac071d4b711d4bbc02e9fc80a4b SHA-1: 15e66989478af2a8de78a61ea2fcc3661f734dc0 SHA-256: 8663d175252ea02dc18bd7be4fa95bb8dfad407de9f3b4099a0cc5de660040d3
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?utm_term=adventure+time+princess+bubblegum+voice In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/boxatemet.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/a43c9a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc1778ca97599144e2ee0f3/1606514573198/blueface_football_stats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc1635e5147b14804678476/1606509410357/the_marvelous_misadventures_of_flapjack_bubbie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c69c88c99b6d37b36994/t/5fc52e9ff3de5e49b50c7e0a/1606758050858/webuporerixefogufinamekuv.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/48186015664.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc2bc1aeaf37e3b64f6a860/1606597658651/mitologa_griega_dioses.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c2059698b02c7f395ada/t/5fc5a5ad3485235c868996aa/1606788527496/coc_hack_apk_for_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc24b992dd96f591839b446/1606568858045/ridifafejivuliruv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4c78139af037644e8c4/t/5fc2180b08845d0924d224da/1606555660297/50791907577.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/guided_math_lesson_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe102f173fb5383b69934a/1606291504487/utter_cracked_apk.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_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 5372 bytes
SHA-256: 10a0f53ecb9f3ab9332556c2203b4b243b2f29b31a7d2aa04c4d5817d25b470d
font_01_sfnt_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 11168 bytes
SHA-256: 772b8240dc755b0dc7aa8af8139cda32783575fd685076b9fcef3db2cf73211a

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