Malicious PDF — malware analysis report

Static analysis result for SHA-256 756528be62f53a94…

MALICIOUS

PDF

71.4 KB Created: 2021-02-11 17:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0486186f7ce18d9de073da7a125f369e SHA-1: 750747a2435cd0d242ad82744305424167f79011 SHA-256: 756528be62f53a94e9d48c1120af71076ea503ed1f2c7713b85834d5473ac81a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting or link farms, suggesting a scheme to drive traffic to potentially malicious or ad-filled websites. The 'Super Bowl squares 2020 printable' lure is a common tactic for phishing or scam operations. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://leonvi.ru/wix?keyword=super+bowl+squares+2020+printable PDF link annotation
    • https://cdn.sqhk.co/vipujitebiki/dqgjhgj/79707880674.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/icjdmjg/pixel_maker_studio_3ds_cia.pdfIn PDF document text
    • http://latirogemiwufiz.22web.org/xurugusivuvalopis.pdfIn PDF document text
    • http://netusikofigo.22web.org/nudulatusa.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/rpjaj9W/losenebafofodozomizipe.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/0aUkXvs/xijajixenal.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/djfgejg/zenofuzarovimamab.pdfIn PDF document text
    • https://limejanokevipa.weebly.com/uploads/1/3/0/7/130739330/gozij-gememasaxat-vawun-moloditis.pdfIn PDF document text
    • https://cdn.sqhk.co/sevilebup/VhgGjb4/world_war_1_simulation_game.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/khdJUhh/37666892834.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/jijumupade/femuberagugozujo.pdfIn PDF document text
    • http://radalimufan.rf.gd/90361175813.pdfIn PDF document text
    • http://nofegogimulat.rf.gd/toxugukubis.pdfIn PDF document text
    • http://vebaxabono.epizy.com/agree_disagree_essay_template_pte.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/komun.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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 5548 bytes
SHA-256: bcef3b994fdc8d3cc93246ab18cae9f2dd9b532528e963c7ee1d41fe84b28850
font_01_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 10580 bytes
SHA-256: 1cf8e962d2ef676cfa6397ecb16ef3ab702914839006394f0e7f92a11c47328a

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