Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8cac913cf930db…

MALICIOUS

PDF

73.5 KB Created: 2021-03-28 09:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1313c7004580573c8c0939b2b20ad68e SHA-1: 98e9268b331866084b4d529321fddd4aa50cbea2 SHA-256: 7d8cac913cf930db16bdfa6ed46c9e380d757814ef6fad06e8b5a51de1cb2ea9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://xezojetit.ru/strik?utm_term=the+boy+in+the+striped+pajamas+summary+chapter+7 PDF link annotation
    • https://davikexovenatu.weebly.com/uploads/1/3/4/5/134587521/6966a3.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/gobexema.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/norisiwikos.pdfIn PDF document text
    • https://xowesujitevenas.weebly.com/uploads/1/3/5/3/135321640/vofeniwet.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/sogenoxuza_mamusinuvo_patajupejutet_lulodil.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/1605252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/57632204604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4377dd-e4b1-4441-91aa-7ec2529bdc63/how_to_unstick_a_vcr_tape.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/74500294854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7f00ba-ce17-43ce-bb5a-a342e197807c/sorudazudaxetadosufatel.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/eugenie_brinkema_the_forms_of_the_affects.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_2b11224281504f16b3ea0a1fb4cedb0f.pdf?index=trueIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_f6ab74eeb9ce47c6988152d7cab23beb.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_565dd6f8f2cd401e9e28dd418d526d5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21227688-0f92-40d6-a66e-2a5a903759fc/pumegabibisalitez.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/badgery_creek_airport_information_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/scryer_rep_guide_tbc.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/34924967198.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/chunar_full_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/cad_3d_motovario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2030d6-95a8-4012-9093-c50382ba8e2f/fenunokapepaj.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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5628 bytes
SHA-256: 986dfd18603e0ef775decd755efaa4224186c9e85ff60ec54caff9f398e62c48
font_01_sfnt_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 10440 bytes
SHA-256: 36ca91f0a9fbe0eb9c6ee495afa2df393e63fc1e5d14e532969079ef7dca3554

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