Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6e381682fd6590…

MALICIOUS

PDF

81.6 KB Created: 2021-03-20 15:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 23d6950ccde34f9603c4f86dc54616ad SHA-1: baf37a3cc3a240eaeb8244b664e327edba9e4bd5 SHA-256: ce6e381682fd659058491458df53df23eca42c69157d1980eab55f1149b24e41
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to link farms and redirectors, indicating a phishing or malware distribution attempt. The presence of a PDF_SEO_LINK_FARM heuristic and multiple external URI firings strongly suggests this document is designed to redirect users to malicious sites. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=okay+meme+video PDF link annotation
    • https://cdn.sqhk.co/kifuzopeko/gjUQhj3/kukedizenodufoxik.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/gVnjbjc/spiral_christmas_tree_outdoor_lights.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/tilafo.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/heY4ico/dokewaxajipiwubejej.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/igjfmja/gipifinotedidebijizi.pdfIn PDF document text
    • https://jabekidedur.weebly.com/uploads/1/3/1/6/131636775/7330141.pdfIn PDF document text
    • https://dugumali.weebly.com/uploads/1/3/1/4/131437411/wofobabasusa.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/iijcifR/45800224893.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/jjf9aij/educa_33600_pce_wildlife_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ichAoeE/86594756155.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/sazixipame/45083665708.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/kadigipijikotuxudunibix.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/548597229.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/horde_leveling_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/what_is_to_be_done_lenin.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/zewosepedufulufeveredife.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_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 4920 bytes
SHA-256: 067bf8d45b9567d36aa9578ade14ee5f7f690fba8d92cfa79d419b53061bb620
font_01_sfnt_off00010411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 5468 bytes
SHA-256: 24fb06a57c8563f6b7024e4bc717bbc00e9c22199b0b404343845617ff7d9c58
font_02_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 11300 bytes
SHA-256: f68e88291cea7829e11ec81dc36bd49820c60d5a38a2531a5cac7f5c99995148

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