Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6a0569b1bc2a8b…

MALICIOUS

PDF

69.9 KB Created: 2021-02-18 00:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 001c85df75ee3921baf2183ff641b99a SHA-1: 5c0813d4eb2d829c98bd5bb20e3432e87b325095 SHA-256: 7f6a0569b1bc2a8be76618766564b4ca129bc31cefb4fca1b57b9392fa955701
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and the document body includes a search term ('Dell optiplex 960 ram specs') suggesting a lure. Heuristics indicate this is a link farm designed for SEO manipulation, and ML classifiers strongly flag it as malicious. The presence of external URIs and the overall structure point towards a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/123?utm_term=dell+optiplex+960+ram+specs PDF link annotation
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/jumodub.pdfIn PDF document text
    • http://qwertyujg.xyz/bevotopesoxajukofox7xmdr.pdfIn PDF document text
    • http://tixshopclub.space/power_air_fryer_oven_model_cm001_manualkm2ft.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/53fjgDh/povikixogikiwi.pdfIn PDF document text
    • http://xenuven.22web.org/32442569811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fd06adb60bf2.pdfIn PDF document text
    • http://ehaberdevlet.com/nasavuxikapemutf03ve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fd30cd27f1e1.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/449270.pdfIn PDF document text
    • https://cdn.sqhk.co/vekotevudoze/gc7ibja/pj_hero_masks_coloring_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5fc8874fbc63e.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/L3he8hr/arcade1up_nba_jam_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/jdicQjg/42858402162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_602d926f7e7ac.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/ruweb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wegajovekesowor.epizy.com/worksheetfunction_vba_sumif.pdfIn PDF document text
    • http://nitasoginit.rf.gd/bandwidth_affect_speed.pdfIn PDF document text
    • http://madanekobovuge.epizy.com/classification_of_angina_pectoris.pdfIn PDF document text
    • http://panidipelenaju.epizy.com/bts_love_yourself_answer_wallpaper_hd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 5596 bytes
SHA-256: f1f9c65b33fb675910542c19fe4d7fdfd5f170f58caed385111e94273704d2c2
font_01_sfnt_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 10716 bytes
SHA-256: b69331992104388b9e06f86ef1c41a63ba7f8a9cea8f0adfdaa71699d0095fc1

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