Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cc6bccf001e632…

MALICIOUS

PDF

78.1 KB Created: 2021-03-06 17:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05a67c0a1b303fea82cd35f1a93f13bb SHA-1: 1e18a89ac555ae948ff61b10c97e69b16b69406a SHA-256: 06cc6bccf001e6321764e44ab463dff4f48aa468ba0403243599c30a6acaea7c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly-hosted PDFs with numeric slugs, indicating a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these linked resources. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/wix?keyword=chapter+12+section+3+dna+rna+and+protein+study+guide+answers PDF link annotation
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/9fe935d789.pdfIn PDF document text
    • https://zewalomoweso.weebly.com/uploads/1/3/4/5/134588134/ropotujol_siloraxodeju_xarazumus.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/8e0c0c0f.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/gickhjH/how_to_iron_clothes_with_a_straightener.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/ehixih8/lerirotikatutibonugakif.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/LjhjbB0/car_x_drift_racing_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_601dbb8d1f02a.pdfIn PDF document text
    • https://wokiliga.weebly.com/uploads/1/3/0/8/130814475/wovipalejinegi-litunot-xasegul-gajumakefuxur.pdfIn PDF document text
    • https://xezudabumaku.weebly.com/uploads/1/3/4/3/134377243/6a1d4d6d6131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff2df2b1e458.pdfIn PDF document text
    • https://xegadoponuxi.weebly.com/uploads/1/3/0/7/130775279/jimud.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/lfgjEii/takeout_restaurants_open_late_in_memphis.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/eEhafkU/subway_surfers_princess_runner_apk_mod.pdfIn PDF document text
    • https://derivasip.weebly.com/uploads/1/3/1/4/131407068/51219f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_e5f1afca68004e51a3d21d7d54ac18c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezobasit/sovijimekileda.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/sedimentary_rock_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/hec_attestation_authority_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/pittsburgh_steelers_injury_report_2019.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_304042a430484ed79e7e9c4aaa0ebcd9.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_31c530858df747718c5422d38071b353.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 1684 bytes
SHA-256: a8640cb23b15ac802f89dd0648c07b7ad030d8b62c5f78624c3814794ace58c4
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 5752 bytes
SHA-256: d8e9b6c48db20eb89d1f308e27f00d6c391bf4c9756762d7352810618855e157
font_02_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 10032 bytes
SHA-256: 5e217a1a8687b248e283d0b0621a3b5cc5c01938fa9976461d3729a7ad905bda

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