Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec89019181112a2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 06:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2be5c859524a8f4e2e0b97276c400bb5 SHA-1: dca1540d7bdbdda0ea3d1bbd1e0b9bb75802ddb2 SHA-256: fec89019181112a29337d83734f20bd8b14d0fa8d3c90aa6421ece0907320413
206 Risk Score

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. It uses a QR-code lure. 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 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/award?keyword=komplikasi+anemia+megaloblastik+pdf PDF link annotation
    • https://cdn.sqhk.co/suzagofi/jihdNUj/beckett_football_card_price_guide.pdfIn PDF document text
    • https://zuwositoxo.weebly.com/uploads/1/3/5/3/135315809/xilolesade-kexuga.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/53e7e.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/1hbJjgg/30929744200.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/f37RgcC/26985690903.pdfIn PDF document text
    • https://cdn.sqhk.co/mizosamox/fieCyhe/download_game_table_tennis_3d_mod_apkpure.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/muwumasuvibuxifa.pdfIn PDF document text
    • https://pasirukeb.weebly.com/uploads/1/3/4/0/134017476/sapusojezizakirumin.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/toxoreju-safifasisowifo.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/2524375.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/cihjm5S/mapgenie_warzone_map.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/dShj7xV/valkyrie_crusade_apk_down.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/chaib99/82249821079.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masusoxowep.onlinewebshop.net/fuwarivapodewaguk.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_b0145ce51ea14b248fd2718468060a60.pdf?index=trueIn PDF document text
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_e05168f2ef224deca83913b0eb9dbad4.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_569f938e1a0d413b87762aa206cb294e.pdf?index=trueIn PDF document text
    • http://pexofapu.myartsonline.com/2576031779.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 5440 bytes
SHA-256: 6dcfb299dc20d6bd5d968d011cab4f6e78c6f2f963d790939f85a8ef12c5af3b
font_01_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 10492 bytes
SHA-256: 0e3301ce72d32cd12abaaf968d290a23758dbd86fd6c20183f8637a864e9ca91

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