Malicious PDF — malware analysis report

Static analysis result for SHA-256 b554115579de8bed…

MALICIOUS

PDF

77.5 KB Created: 2021-04-09 10:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b71c28403f6bf9fd220f5b9e45de33c5 SHA-1: 836d157354ada00a7cb2c66bc45d5c0f748f87a3 SHA-256: b554115579de8bed178e39ea2f729dc63a301b39167504c1cff907d1a738f68d
186 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. 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 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.
  • 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.
  • 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://fokemale.ru/strik?utm_term=massey+ferguson+35+serial+numbers+location PDF link annotation
    • http://nubemeketetu.mypressonline.com/unstoppable_god_elevation_worship_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/xekixuzurim/Q7Zidgf/dominos_codes_ireland_june_2020.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/barkha_dutt_books.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/92147557713.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/jbhhcjj/swing_man_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/giHBnmD/bomb_squad_vr_mod.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/fatuzimivol.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/KANiTid/mawaradunowovabapijunep.pdfIn PDF document text
    • https://gejejemimegi.weebly.com/uploads/1/3/4/8/134899280/8885982.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/hhhjg0L/surah_shams_full_with_urdu_translation.pdfIn PDF document text
    • https://lizuxafemow.weebly.com/uploads/1/3/0/7/130776517/vodurimudum.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/iecidhh/58300000117.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/cdjiDzp/jigesugubozojikufes.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/51426170982.pdfIn PDF document text
    • https://cdn.sqhk.co/pivoledofag/hhc1jfR/lexical_approach_michael_lewis.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
    • http://joriboka.epizy.com/rotijikukezosif.pdfIn PDF document text
    • http://pakilapawunafep.epizy.com/zogaxelazotomadef.pdfIn PDF document text
    • http://govabipisu.epizy.com/76846849943.pdfIn PDF document text
    • http://gotimovogeminir.myartsonline.com/denon_avr_x1500h_bedienungsanleitung.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_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 5616 bytes
SHA-256: 6ae81e0d9e9152c59c8faa10a6d266344c3b9a9f9647311389fe4d3fd7b77e9e
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 10532 bytes
SHA-256: 29ec2fb57942467c2dc94596841e8093594dca0e55c2ef0ed57a5bbdf819321b
font_02_sfnt_off00011a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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