Malicious PDF — malware analysis report

Static analysis result for SHA-256 3589378c6fa5ddc8…

MALICIOUS

PDF

75.1 KB Created: 2021-03-31 00:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a6f2f3757eb4017bd907441a8897dc5 SHA-1: 9ece516c9e17299161daee6dd3fd9d76f7a40653 SHA-256: 3589378c6fa5ddc8be41031ec539e5ce1dd06fc814c6ab3762cd77eb5e99a780
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 0.9993

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://zajinet.ru/award?keyword=air+cooled+chiller+carrier+pdf PDF link annotation
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/kiduwalapaka.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/legend_of_zelda_skyward_sword_guide9619l.pdfIn PDF document text
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/1270416.pdfIn PDF document text
    • http://lenudes.com/64985970101z7uaa.pdfIn PDF document text
    • https://xatotaga.weebly.com/uploads/1/3/4/7/134726025/fb570d32d8.pdfIn PDF document text
    • http://store50off.info/farexikalohpwy6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_601188962f4a7.pdfIn PDF document text
    • https://movadopudi.weebly.com/uploads/1/3/0/9/130969115/mimabewisabolexus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_6060b7c094c29.pdfIn PDF document text
    • http://trelon.fun/pirates_of_the_caribbean_mp3_ringtone_downloada9c69.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/4ghjcYF/5897116497.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/bBagiwO/19988796113.pdfIn PDF document text
    • http://choosemadam.site/60040958576nrfn0.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/fY4HtZs/worship_songs_ukulele_chords_easy.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/zesixefe/toxoplasma_gondii_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/alone_together_tagalog_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/inhibit_adventitious_root_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/89070452386.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/94632396666.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/53811597410.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/sulivujunezexogigomive.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/zokifu.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/58740492821.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_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 5056 bytes
SHA-256: 2eeaa78451b2007a4f84b33954768e35a74275648d4d4e16c4e6efc9ff6a33b7
font_01_sfnt_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 11044 bytes
SHA-256: 5ea102be3f6bb34b0dd2a49ebe659e03deee2591b452287c483cbc2f1f13b5ed

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