Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a7f32f7f45f011…

MALICIOUS

PDF

81.4 KB Created: 2021-02-17 15:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 53121f13e11dfdf3ad7ff203d7f55270 SHA-1: 9b5a702ed1f922dd4e5a30f8993fff9b9b160e63 SHA-256: d1a7f32f7f45f0116e18b7627c24f0408190f047b6435fbcdc1088b99b79579d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a link farm. Several heuristics indicate this is a SEO manipulation tactic or a lure to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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
  • 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://druttle.ru/123?utm_term=do+i+need+a+mini+facelift PDF link annotation
    • https://cdn.sqhk.co/vufebevefo/VdD1hdc/game_of_thrones_wallpaper_for_iphone_11.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/yheijwN/assistant_store_manager_jobs_near_me.pdfIn PDF document text
    • https://vozidetuvotivex.weebly.com/uploads/1/3/6/0/136094215/609252.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/zcdnUgh/singing_pumpkins_review.pdfIn PDF document text
    • https://zavifojixu.weebly.com/uploads/1/3/3/9/133997579/verivexuroguse-wumujugafe-govog.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/jFewQBe/79816028436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453575/normal_5fd83f5c736aa.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/zafigujokaliren.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/hTwsifM/talking_tom_app_dangerous.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/9023528.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/luzaxasid.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/jewisiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/sakezor.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/grid_template_areas_syntax.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/market_leader_advanced_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/40047454027.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/wepanizezuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 4680 bytes
SHA-256: 6ba80b9ffc3ebc87f5180bbe4007d98e78b7ace91938dd41eb29871f145b7564
font_01_sfnt_off000106e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E3 10452 bytes
SHA-256: 992db99f3319de93745fbb7711d754d43e57fbe14c19b674a81967913e451f10
font_02_sfnt_off00012ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.