Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c78436e0143d72…

MALICIOUS

PDF

74.1 KB Created: 2021-03-01 03:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3a1a29b3ec802912e51f04205d93e54b SHA-1: d388f97fcf0c344161519922ab21f6f3d49e183c SHA-256: a1c78436e0143d72830bfcfa86d44d5c53d06f5aadf1fd7d62eb8939443b166b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=strength+training+exercises+weight+loss PDF link annotation
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/342246.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/8f3e5935cb4523a.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/jijezuxilun.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/goxizajasuloto.pdfIn PDF document text
    • https://bosupazalo.weebly.com/uploads/1/3/4/4/134473359/2274175.pdfIn PDF document text
    • https://pafolerasakuj.weebly.com/uploads/1/3/1/4/131438226/5207415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_600b6cc672cee.pdfIn PDF document text
    • https://zivazumuwekaf.weebly.com/uploads/1/3/2/6/132695746/xateguwogakive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_60216df16d2b7.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/advantages_of_direct_rule_system.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/horizon_zero_dawn_game_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixuroruwe.myartsonline.com/97768794761.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/are_spinach_banana_smoothies_good_for_you.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/ampere_pro_apk_3._18.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/arsenal_vs_frankfurt_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/whatsapp_for_nokia_230.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/charles_bressler_literary_criticism.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/pogired.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 5324 bytes
SHA-256: 29bb7cfec8dfff790ed37397d9be42c7c9489accf50897b1af5f2addbd520dbe
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 10444 bytes
SHA-256: 98ab1ae920c5cf4e35640984fb15839496b42a45f9e7be90af5dea0e28a9f77f

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