Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bc6605d300af88…

MALICIOUS

PDF

72.1 KB Created: 2021-06-13 01:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 938b40f43ca34e2fb965292e53ebcaf5 SHA-1: c3f8af1c3cb913ac4666b468dde2cc174ad4c21f SHA-256: 68bc6605d300af8833319fdbc0d6505274b78cc93f5d37cb2a5871064c96aeff
156 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a mass of external links, suggesting a link farm or SEO poisoning attempt, with one primary URL pointing to a potential phishing site. The document body is heavily obfuscated and appears to be a lure related to "the grinch soundtrack original". No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=the+grinch+soundtrack+original
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/jepunawib-zodisenab-semomipopu-mosobetegatop.pdf
    • https://gusobukenifoku.weebly.com/uploads/1/3/4/5/134525986/2cf98f0b95bd4.pdf
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/04a1fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tedadopite.pbworks.com/f/pujosotipapoj.pdf
    • https://uploads.strikinglycdn.com/files/0f0b7bf7-f091-442e-9e88-c75baf35f8f9/how_many_times_has_nato_article_5_been_invoked.pdf
    • https://uploads.strikinglycdn.com/files/ff82dc51-fdb8-4172-bca6-b79cd3c7add5/acer_chromebook_spin_11_will_not_turn_on.pdf
    • https://uploads.strikinglycdn.com/files/8450a0d1-4a47-4c89-b379-258ee7bc8531/bose_sounddock_series_ii_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/c62bc293-e5f4-436c-b38b-06a5c14d7d76/how_to_tell_if_oil_furnace_ignitor_is_bad.pdf
    • http://redejok.pbworks.com/f/wallpaper_happy_new_year_2021_wishes.pdf
    • https://uploads.strikinglycdn.com/files/bb5f12ad-eb2a-4d3f-acbd-8bb0004253c3/palevaruzokibokavo.pdf
    • http://kumarifili.pbworks.com/f/cache_creek_bus_schedule_vallejo.pdf
    • http://xizalow.pbworks.com/f/how_to_cook_omelette_in_pan.pdf
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144437511/5276244700.pdf
    • https://uploads.strikinglycdn.com/files/3bcba2f9-04c5-46e4-a85c-d18140962f0e/dojeju.pdf
    • https://uploads.strikinglycdn.com/files/e37c0829-3451-4b24-a77e-bdeea1f1806c/wojogevuzi.pdf
    • https://uploads.strikinglycdn.com/files/b05cf778-7322-4205-8a8d-625ba5bc898c/is_elevated_blood_pressure_bad_while_pregnant.pdf
    • http://sekodegaxex.pbworks.com/f/b1_reading_comprehension_exercises_with_answers.pdf
    • http://vuxoris.pbworks.com/f/fifty_shades_freed_hindi_dubbed_full_movie_download_khatrimaza.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd2.bin
bcb3ab640230e58f406845ef2da203b484f29627e4dad5af5f97fe03e89f3e03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 5212 bytes
font_01_sfnt_off0000ed8a.bin
cd5a91a04b80a2fef85588fd1be99890f2986fe4f2858e4af32428b259f5cae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 10508 bytes

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