Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dd98142f97ad99…

MALICIOUS

PDF

82.3 KB Created: 2021-03-16 05:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 300bd3264dc9202bbf6500fe7bf67093 SHA-1: 836b29836f38918339ee1867446cee68384f5071 SHA-256: 64dd98142f97ad99aaeef9d7f3b08fcb1ba6ea1a374bf705cbe8e6136ed74322
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xajibur.ru/strik?utm_term=after+we+collided+australia+netflix+release+date PDF link annotation
    • http://zizowifajazabor.22web.org/what_is_the_spark_plug_gap_on_a_briggs_and_stratton.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/5371393.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/mUhfGAd/clash_for_dawn_guild_wars_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/iiwNkjb/double_gun_holster_rdr2.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/jdYCgcC/32538549472.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/e0305af115541b9.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/RRdhewL/90567327853.pdfIn PDF document text
    • https://cdn.sqhk.co/zagawodijimo/Hbgclib/50986353714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_bbc657088e2347f1b6a4fe1ab5b83b85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/saris_cycleops_fluid2_smart_equipped_indoor_bike_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/facebook_video_size_guide.pdfIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_30e6e4d4cc9743c38ec0a7970e277f24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokudapele/5856887861.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_d55c1f9f1392411f9d6f2c8666566909.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_a83f2796ff70443cbcbd801934ba6c37.pdf?index=trueIn PDF document text
    • http://kubatejabudebuj.rf.gd/xekomojopewawowexe.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/bareilly_ki_barfi_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/fundamentals_of_physics_10th_edition_checkpoint_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 6920 bytes
SHA-256: a8c972c229a241a6d1801bd30c63f0ed6adf3d91bf45f715af76e03721b9ff4e
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 5164 bytes
SHA-256: 0fada22c28aa6ac71d32b40ce5dd1763a8ec31c0bd817f6b22f78ec5290dcd2a
font_02_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 10912 bytes
SHA-256: c0566dc82508f8492b78d409638f62d1275e7abb4be66b6969658efd07b1d2ac

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