Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0210abeebb9b724…

MALICIOUS

PDF

80.9 KB Created: 2021-02-23 16:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: de2b0b4766bdda59c310bd009df53374 SHA-1: 7cf5e15eaf413a6a0657ad6c1562b3d0fb292595 SHA-256: f0210abeebb9b724f7374c74b624eb9a4f3a92c51e3c0b2a94be54c274c399ed
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and uses suspicious links to lure users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to domains commonly associated with malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/123?utm_term=how+to+get+credits+in+sims+4+university PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff606d81e782.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/88agfgc/break_time_images_coffee.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/clCEey8/12252293612.pdfIn PDF document text
    • http://unosital.space/netflix_after_hours_reportxy9kw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_6013f74f62a75.pdfIn PDF document text
    • http://klokisik.space/jamie_eason_live_fitjro2s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_6011f177ee93a.pdfIn PDF document text
    • http://heleogose.online/sda_church_heritage_test515kr.pdfIn PDF document text
    • http://nout-prokat.website/epf_withdrawal_form_2019mszz1.pdfIn PDF document text
    • http://com-login8.xyz/jarawipudelivul4g3hb.pdfIn PDF document text
    • http://slimitalia.space/gejijuzosinirabatapezxce1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://babevuzax.epizy.com/safonaluniduzutojosixe.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/shopee_apk_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/primary_adrenal_insufficiency_management_guidelines.pdfIn PDF document text
    • http://rewogigove.epizy.com/tinujomagafelonojeberes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 5320 bytes
SHA-256: 8794ed45234e1d8c79291e6366870dc23d80135a378e9b6bbb306f6f2668caf7
font_01_sfnt_off0000f765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF765 13100 bytes
SHA-256: cb7732dad093bf835ade6c6e213c2b7f6fe89da977392837ed2f1f86f7f33a88
font_02_sfnt_off0001218d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218D 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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