Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0692051acef80fc…

MALICIOUS

PDF

83.1 KB Created: 2021-03-21 06:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2c6affb346e8252e942858a08940d1c5 SHA-1: 7dd4e89835c6c82e99b840a1da690fa6918ba29b SHA-256: a0692051acef80fcf37c52be8b4abd13b1cd8775135f3307caefff47accedc2c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized redirectors and potentially malicious content, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/wix?keyword=visible+light+spectrum+uses PDF link annotation
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/2427200.pdfIn PDF document text
    • https://guvusogom.weebly.com/uploads/1/3/5/3/135324715/nemamusasus.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/e5hbWte/kosigawetuwowetepedoli.pdfIn PDF document text
    • https://vomizovuzib.weebly.com/uploads/1/3/1/6/131637161/tivibijat.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/2444303.pdfIn PDF document text
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/basuvuforo.pdfIn PDF document text
    • https://likixadukevagal.weebly.com/uploads/1/3/4/7/134700169/kamututalo.pdfIn PDF document text
    • https://juvumumirogo.weebly.com/uploads/1/3/5/3/135313675/1e94890959a08c.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/2785028.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/5830348.pdfIn PDF document text
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/b7b691a9211c.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/jghhc3U/98673551292.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/sesafefanulokam/belkin_router_manager_n600.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/business_plan_coffee_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/lomofereganupalanekomib.pdfIn PDF document text
    • http://temekem.epizy.com/can_you_have_2_x1_dvr_boxes.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ge_carestation_650_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/gagasezegumosil.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/top_notch_fundamentals_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/introduction_to_mechanics_kleppner_download.pdfIn PDF document text
    • http://bamasagure.epizy.com/android_software_for_pc.pdfIn PDF document text
    • http://fijinibegomiba.rf.gd/rmit_harvard_referencing_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 5240 bytes
SHA-256: f408c2b195b862ac77d156ada0fd360855b76a48bb0d421a36e1f4aa6690314f
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 11500 bytes
SHA-256: f33f1b0b1b8c370af7ce687145948bca033390af76c5a620acf8ec2d8128b9ad
font_02_sfnt_off00012a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833