Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b15fcbd31fd8ad…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 18:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e78eaf228e571d5c6603f32d83126da SHA-1: 9b925367dfc861f8f3ced856722e0dcd93b7b84b SHA-256: 57b15fcbd31fd8ad7e739bf45b594db0027c1341c0c69a625a4775991831854d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable hosting services, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure strongly indicate an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=altistart+48+telemecanique+manual+pdf In PDF document text
    • https://ledagesobefe.weebly.com/uploads/1/3/4/3/134367542/5347511.pdfIn PDF document text
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/lajojezul-xukuwedaruwuzab.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/lhazsgc/allegiant_flight_phoenix_to_billings.pdfIn PDF document text
    • https://kusijavi.weebly.com/uploads/1/3/4/3/134385668/gamudabizewov_ladorakoka.pdfIn PDF document text
    • https://cdn.sqhk.co/zukivutos/ihjhFoJ/ice_cream_blackpink_dance_tutorial.pdfIn PDF document text
    • https://murezujal.weebly.com/uploads/1/3/5/3/135305344/gijesisaju_xigibobalamupat_giluvisobuw_xamelabawadev.pdfIn PDF document text
    • https://bujubilefo.weebly.com/uploads/1/3/1/4/131406518/rapopuxogijovedi.pdfIn PDF document text
    • https://webuwoterin.weebly.com/uploads/1/3/4/5/134589655/nadokugegi.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/kujesor-gagelone-jupozasabol.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/dCgjiaK/glass_break_wallpaper_download.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/xupixop.pdfIn PDF document text
    • https://cdn.sqhk.co/lokovipazal/icJjd6n/sloth_goonies_mask_with_moving_ears.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/gazibupadopexab-tewuzakorekore.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://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_6f834b84bd9343ea8f3375818bd02291.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_6c98842ef22e4e95a30ddd911f10fd99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/metabolic_autophagy_siim_land.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_dc73dacc07ca4a889194e189d9eb7522.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varoximu/how_to_connect_lg_inverter_direct_drive_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/50745963629.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_931457aeecb5436eb6139d5165fa1d72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagokiko/javascript_full_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/evidence_law_practice_questions_and_answers.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_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 5472 bytes
SHA-256: 925219eb13e866fae482c8c1a763de748260fca96d16b34292c69c45d5846001
font_01_sfnt_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 10548 bytes
SHA-256: 271edd96bc896d37a7f682b33071dfd15b72774ab8b365962450173c2c45f948
font_02_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f