Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeaace9858487e2…

MALICIOUS

PDF

76.3 KB Created: 2021-01-26 11:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3eab658a0f0cfc8333ce33572dc5fd47 SHA-1: b0526431dd2d8a81aae405f2b8084fe73904d16b SHA-256: 6eeaace9858487e2baf5741ff49380638838c5e3b27c22a9b1f196a3393f592a
156 Risk Score

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 0.9999

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://traffine.ru/wb?keyword=forest%20stream%20live%20wallpaper%20free%20download PDF link annotation
    • https://cdn.sqhk.co/ziloteduxemo/hgAjeBi/42881630887.pdfIn PDF document text
    • http://losinglotterynumbers.com/989446108269ybr5.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/jtdhgih/31862059065.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/SgihcvE/7_24_perfumes_shopping_app.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/buritazuviwofi.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/hbb04ha/black_hair_short_hairstyles_2019.pdfIn PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/1706024.pdfIn PDF document text
    • http://biomanix.best/transgender_top_surgery_female_to_male9nhbw.pdfIn PDF document text
    • https://cdn.sqhk.co/wogebebaruro/gdgh8ic/hard_time_prison_sim_vip_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hffhGgf/zununaregasuno.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/nemafu/chick_fil_a_chicken_salad_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/rukozolovedipi.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_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 5296 bytes
SHA-256: 1017e9629e8a21c35a26d89a37e7c1164b77159779880eceacd8e3563600f90c
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10336 bytes
SHA-256: 1f0b073f644f1f217840fa2774043e7b18d4eada7b5c26098fad7be8ca02697f