Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62d84f9f7bf1f8f…

MALICIOUS

PDF

87.2 KB Created: 2021-04-05 01:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70e9f2cff64e839da067d09c759cef38 SHA-1: 39fa3f99cead2da9c42f9926b660a086787c6d6a SHA-256: b62d84f9f7bf1f8fb67027439859b4ac0e56926241cced224ec556666d3e4a8b
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The presence of a UTM parameter in one of the primary URLs suggests a phishing or social engineering lure, likely for a free download. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • 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://leonvi.ru/strik?utm_term=emotional+agility+ted+talk PDF link annotation
    • http://setafugeridol.scienceontheweb.net/8100701800.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/dakopekoz.pdfIn PDF document text
    • http://cetapp.xyz/695742727657yi5v.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/dalarunafebifakomim.pdfIn PDF document text
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/sivonarivok-savalezi-gedusukuf.pdfIn PDF document text
    • http://clubstore.info/sears_craftsman_12_inch_wood_lathe_parts1vohb.pdfIn PDF document text
    • http://esplus.pro/sowodade2ocu4.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
    • http://gutekuretejapoj.onlinewebshop.net/curso_basico_de_ingles_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/39643936716.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/nuzov.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/what_is_the_bolt_pattern_on_a_2000_jeep_grand_cherokee.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/remington_sps_tactical_bolt_action_.300_aac_blackout.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/the_art_of_conversation_questions.pdfIn PDF document text
    • http://toxifiv.myartsonline.com/mexovikowazur.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/dubrovnik_airport_informacije.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/1363499517.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/datuloferepumivam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 4780 bytes
SHA-256: bb067851e74c45cbc5f1a5c5e7c1a0de4e7e488215b5101633f548eb6eb903c1
font_01_sfnt_off00011ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC1 11084 bytes
SHA-256: d16d35de42b3ddb168660f1e8bf484b962e7ad02e23f96e92847ccd49baebac5
font_02_sfnt_off00014059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14059 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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