Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a42b73860915b7f…

MALICIOUS

PDF

79.4 KB Created: 2021-06-06 19:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 72a9d8ae8758f9c28df64c28d3695647 SHA-1: 4c4b83cec2d43cc1c8ae1de8bac57830bf8dbcde SHA-256: 9a42b73860915b7f14ada5a5e4c1b97a96731e2bd3d2c24e5764eec439bddddf
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'genetically modified foods', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/pbw?utm_term=what+are+some+pros+and+cons+of+genetically+modified+foods PDF link annotation
    • https://xaweguzo.weebly.com/uploads/1/3/4/3/134318762/fokupufizedu-depixuvananipe-zubusupepovod-rugaresera.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/9f0087b064d650.pdfIn PDF document text
    • https://rapowude.weebly.com/uploads/1/3/1/4/131454581/wexokusiligapiboga.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/suwaxofafezatumefape.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/xivibenopaw_wogadedaso_bizijizoleruguz.pdfIn PDF document text
    • https://vogemafebin.weebly.com/uploads/1/3/4/2/134235603/c507b.pdfIn PDF document text
    • https://kulinamolusamu.weebly.com/uploads/1/3/4/2/134234583/5245953.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/zudeninupodos.pdfIn PDF document text
    • https://lazutexex.weebly.com/uploads/1/3/4/3/134380731/b4f61182567.pdfIn PDF document text
    • https://lekusimije.weebly.com/uploads/1/3/1/3/131383821/16d281432.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/5701753.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/4722185.pdfIn PDF document text
    • https://gikapatom.weebly.com/uploads/1/3/4/0/134042778/vomanavuwisidez.pdfIn PDF document text
    • https://kivuxobusev.weebly.com/uploads/1/3/1/8/131871605/minelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujolajoxek.pbworks.com/f/how_to_upload_ignou_assignment_2020_online.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144427386/fijinemavivejajanarenimoj.pdfIn PDF document text
    • http://lajunola.pbworks.com/f/somoxud.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/how_to_do_istikhara_quran.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144416781/cheat_crystal_marvel_future_fight.pdfIn PDF document text
    • http://lifuzopa.pbworks.com/w/file/fetch/144666831/28411569921.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/f/888655624.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_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 5684 bytes
SHA-256: 9d18dee60731ccf9a91c066fa2e270442c5629195fad3feb77c4edbbbf469047
font_01_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 11260 bytes
SHA-256: ccd6176bf05101ba79ee5f525ec566f16f931b36e71c40ff657ee2c2b764bcb0

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