Malicious PDF — malware analysis report

Static analysis result for SHA-256 95af2f788a6adda2…

MALICIOUS

PDF

70.5 KB Created: 2021-04-30 03:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 337075206bb5ce7e4eff93a4bbe6e398 SHA-1: b03b35d5666586cb90dbf6a360c2d2029023767c SHA-256: 95af2f788a6adda26c54a19401664caa24d0110bf06070ad724a4b6a750852f9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution attempt. The presence of a large number of external links, including a redirector URL, suggests an attempt to direct users to malicious sites. The document body, though heavily obfuscated, contains text related to game items and application versions, potentially serving as a lure.

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.
  • 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://pelibifir.ru/strik?utm_term=how+much+chaos+runes+for+onyx PDF link annotation
    • https://cdn.sqhk.co/kidatufo/t54ibX0/meme_hub_instagram.pdfIn PDF document text
    • https://bifutizuwosedi.weebly.com/uploads/1/3/4/6/134645412/tudufim.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/Sif9Zjg/toca_life_after_school_apk_mod.pdfIn PDF document text
    • https://fozegujulukov.weebly.com/uploads/1/3/4/4/134459046/f7540aa9ef5ff4f.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/biology_campbell_online.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/tesotiwapax/4385591415.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/76628767480.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/what_are_the_division_2_football_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/tunevozewisazojavuwedux.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/92457135030.pdfIn PDF document text
    • http://fejonaxi.myartsonline.com/per_la_gloria_d_adorarvi_f_major.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/update_android_7._0_samsung_note_3.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/ar_11_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/esophageal_cancer_screening_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/21589612104.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/why_does_my_upper_back_hurt_when_i_look_up.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/dokewosope.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_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 5312 bytes
SHA-256: ba5a450a574981ee9b6fee366b7b561333f7b4615a562928b43737345f4845db
font_01_sfnt_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 10648 bytes
SHA-256: 72750297f73f4295c12fff6f37a0710b9a143774a78666117bbff56f7ff99628

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