Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac467365347d87a8…

MALICIOUS

PDF

65.9 KB Created: 2020-11-13 08:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a3b2509e6af27b66cda398062530aa98 SHA-1: 98021df29e6f6d7e2c4c2710579fa536adaaa68c SHA-256: ac467365347d87a871d7a33993dbba131dfc37b1489f844af9020472227254fd
254 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the URL 'https://traffking.ru/123?utm_term=radio+catolica+mundial+en+vivo+gratis' strongly suggest a malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a common phishing 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=radio+catolica+mundial+en+vivo+gratis In PDF document text
    • https://sigodujirole.weebly.com/uploads/1/3/4/3/134319969/lupuli_wetepubeguwedal_bonopododabogu_maferamabitep.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/kemuxugofubi_divurizu.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/mivisowol_teratevolepi.pdfIn PDF document text
    • https://sepijoverik.weebly.com/uploads/1/3/4/3/134317252/2940604.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/mijedusovineti/dedulifukuvutukozojo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/shinmai_maou_no_testament_mal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19fcba6-d422-456a-aa57-5e903170e3a0/risafusita.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/34793918812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1b188d-ba2e-4ff7-8725-7ab55541d506/22434455596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c751a56b-fe79-47cd-9ce1-ded60ea86573/zimavepijal.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/piscarilius_favor_osrs_ironman_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/78196672952.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/xupomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690a4609-1fc6-4024-b1d6-9754638b593e/gonid.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/fotubugeliwogubile.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_off0000b40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB40E 5208 bytes
SHA-256: c6b025dd82e409537c1b238bbb7f967d13aac2687f5e163dafa1ffbf55bdde72
font_01_sfnt_off0000c5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B1 11492 bytes
SHA-256: 5169e35df26412ffaa8d2b7223488b2536e76eaa44b3f2271e222d29630b60e1
font_02_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361