Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9cd34beebbcc529…

MALICIOUS

PDF

68.1 KB Created: 2021-02-17 00:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1e8eb79384aa5ac59b57a33fdf1186f4 SHA-1: 2c113fe242e29facdbe752c55dfec0d8ad82c42d SHA-256: d9cd34beebbcc5298bc82e339505275e06ed45ef3688b4d691f64c7e973ea97b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL points to a live stream keyword, indicating a lure for user engagement. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 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://baarspo.ru/wix?keyword=khan+vs+canelo+live+stream+total+sportek PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fed49377bed3.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/Sgc1khc/2351673416.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/kuxevilopu-durisasa.pdfIn PDF document text
    • https://cdn.sqhk.co/bevurokakug/egAjfec/29224004863.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/zigfu0r/the_game_room_store_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60176c5592ef3.pdfIn PDF document text
    • https://cdn.sqhk.co/tezasevimab/Bogdvhb/boss_battle_games_unblocked.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/dixalakam.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/libiwarigatomut_pamerot_zajawaxeval_diviwawa.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/lupajikodireda_zugod.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/jlhg0gj/45281802000.pdfIn PDF document text
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/jaxuxidikesafugi.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/EgcQRJg/space_shooter_galaxy_shooting_tips.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 5268 bytes
SHA-256: 461e5adbf9f5eb4b8a34fc280232586aa076e9d911b0a8d831c439e506247ec7
font_01_sfnt_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 10132 bytes
SHA-256: 84426fbeda467a4e09490f259a6433d62a0449da602841f95c2c0f16c3504360

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