Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecde679571a3ef19…

MALICIOUS

PDF

82.3 KB Created: 2021-03-18 00:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ff8b907ca48faaa0083a89ebecbf39c0 SHA-1: c1bac1adcc08de9230db325ae832d0287cb284ae SHA-256: ecde679571a3ef19e1017d9abd9d707e159244f58d2d5f2818a0168b1367b761
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam campaign. The presence of a URL with 'pubg+lite+pc+steam' suggests a lure to attract users interested in that topic. ClamAV and ML classifiers flagged this as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/123?utm_term=pubg+lite+pc+steam PDF link annotation
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/xovoret.pdfIn PDF document text
    • http://dream-stat.ru/sum_of_exterior_angles_of_convex_polygon70mog.pdfIn PDF document text
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/81b3ee1b69e4e6.pdfIn PDF document text
    • https://loleritukala.weebly.com/uploads/1/3/0/9/130969936/8694925.pdfIn PDF document text
    • https://cdn.sqhk.co/posuwumujome/eOxgcAS/pac_man_ball_game_for_sale.pdfIn PDF document text
    • https://dudosixe.weebly.com/uploads/1/3/4/3/134323580/4182754.pdfIn PDF document text
    • https://leboxinadevot.weebly.com/uploads/1/3/4/4/134440814/penosupuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/igiHj3o/menilubatuza.pdfIn PDF document text
    • https://lexilovomab.weebly.com/uploads/1/3/1/4/131452944/ef3689145af.pdfIn PDF document text
    • http://ilook.market/how_do_you_determine_organizational_culture_developsajb0c.pdfIn PDF document text
    • http://lifeeuro.info/mebas66saf.pdfIn PDF document text
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/vusokepatu-xivudisonitizuw-xilosazo-bafigukibiwibap.pdfIn PDF document text
    • https://taduvovu.weebly.com/uploads/1/3/1/8/131871704/25543.pdfIn PDF document text
    • https://tinuxitimo.weebly.com/uploads/1/3/4/7/134748051/kudotofa.pdfIn PDF document text
    • http://foodguideblog.com/les_miserables_2019_movie_watch_onliner6kev.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/fwjgq8o/62786834285.pdfIn PDF document text
    • https://cdn.sqhk.co/mogujawogo/aXjeUU5/lapuzi.pdfIn PDF document text
    • http://nanolenka.xyz/esl_pre-intermediate_grammar_worksheets0ylvz.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/1035397.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://tefasuxonekan.rf.gd/easy_pencil_art_for_beginners.pdfIn PDF document text
    • http://tezajiduzut.epizy.com/fatukewaxedijodapazi.pdfIn PDF document text
    • http://dalonirutufitad.rf.gd/zavidokimu.pdfIn PDF document text
    • http://jodojan.epizy.com/pepalerenigikapesunu.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 4964 bytes
SHA-256: 188a8e28bf5c0f924fe47b87e22ec4bc2978d3452e16d6adbe639323a2e5e6e9
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 13808 bytes
SHA-256: 67faa56fd5ceb3c7cfdf18e6a1b47daff4638a9cc1305d237ffe50025745df9a
font_02_sfnt_off00012caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361