Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1e9bf7186f0b33…

MALICIOUS

PDF

79.8 KB Created: 2021-02-26 20:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 52ce844c68be8b6032bfdc4f1b68e61e SHA-1: a296d1413182e68dc66d20c6c14cecdc959f57ad SHA-256: 9c1e9bf7186f0b3386f6d4eeb0f2897d3999fcc22008a1aef48b38504d9ea9a6
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to job offers, which is a common phishing tactic. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=como+saber+si+aceptar+una+oferta+de+trabajo PDF link annotation
    • http://helplnstagramcontact6088756.com/65837389542ql5gl.pdfIn PDF document text
    • https://vajinivokesele.weebly.com/uploads/1/3/5/3/135326698/tawel_mexiresigi_lilosapibokef_tirotirosu.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/63828636674.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/why_is_my_mobile_hotspot_not_working_samsung_a50.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/pMTigij/litinewulugalirolelijowe.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/fAijuiC/world_war_2_games_unblocked.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/the_white_mans_bible.pdfIn PDF document text
    • http://lalat.space/fitness_watch_reviews_consumer_reportsxuy32.pdfIn PDF document text
    • http://tur8osale.site/buwozufof91z9d.pdfIn PDF document text
    • http://netzamka.ru/ladadazixorintus7m.pdfIn PDF document text
    • http://nowtorrentz.com/18349826388h6773.pdfIn PDF document text
    • http://majikok.mygamesonline.org/tosezapusafaxi.pdfIn PDF document text
    • http://italiahot.fun/apc_back_ups_700_manual79nt7.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/xopulexobon.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/vQYuMgd/pugowejubatitewukasugikiz.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/wihgjhf/47712833455.pdfIn PDF document text
    • https://bexulijariva.weebly.com/uploads/1/3/4/8/134885506/fedurazubomudurugav.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/pace_5031nv_max_speed.pdfIn PDF document text
    • http://sadovik.me/39680137763rg9cf.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://satawakerexe.atwebpages.com/12727451595.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_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5388 bytes
SHA-256: 807cafe9fd67344b9228af5f3c06ab1376e5e2b207b9de742df331a4b23afaaf
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 11408 bytes
SHA-256: f56050b3837337f6db1e5da89d3f3cc8a10f9dd520cf11d5503404d8b5ffc652
font_02_sfnt_off00012169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12169 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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