Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3d75d49190e838…

MALICIOUS

PDF

70.4 KB Created: 2021-04-04 14:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 53cb0927d0e259ac4ee2272269ff3dd2 SHA-1: 87e6ebf89499fea909981effd43791c2c48b65e0 SHA-256: 6f3d75d49190e838c4f79eae4deb430fe6d886bdb42e06b9864c43008e7aa012
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=xbox+360+probleme+connexion+xbox+live PDF link annotation
    • https://cdn.sqhk.co/sifilefu/bHujgj2/crazy_zombie_9._0_hacked_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/hnijejh/begging_meme_template.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/pojamuwabugumip.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/eigpijk/retroarch_citra_core_not_loading.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/bogjjjh/miraculous_ladybug_and_cat_noir_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/fpuijkB/motorcycle_trailer_enclosed.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/gdKgigj/pool_air_hockey_ping_pong_table.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/hhbjche/xakakanelaposuzox.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/piapha1/dinghy_for_sale_seattle.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/ferukojalowepoduli.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/zagapaxa/kidigasadefudanovusafaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63021be6-36a8-4ef3-9380-ff3891614f8c/62706825546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef4b8d2-bb3f-426f-a6d8-212937b25ce4/kaxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1220b9f6-1cd4-4a19-bea1-4667786bbfde/capital_markets_lawyer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/19051582516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f857bf48-24e8-43ba-8f50-ff1343ac741c/is_social_phobia_a_mental_illness.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_0b5543fffbbc44e4b4a718f4f447e09a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezux/how_to_use_samsung_dishwasher.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_faf052a1706b4a77a3692e108e649d07.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44af6f10-d6f5-4fa8-92fc-d71719bef867/what_is_more_synonym.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 5396 bytes
SHA-256: 06c12e3e3d8956cc620d7019e790a877d6055ad35fd3b6b70de5286cf743dc71
font_01_sfnt_off0000e546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE546 11508 bytes
SHA-256: 808eb988194b987fe518e9c05a9b066344c18bff50c188d69c9280bc33294875

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