Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db03077dfc331a7…

MALICIOUS

PDF

70.5 KB Created: 2021-02-03 21:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 674e58b54b4b86f39350b7568a1c1e5c SHA-1: def7cde9e30ab67148570d40d72b184a86367604 SHA-256: 0db03077dfc331a702c81ca6c53ec0e3bfc4270f2021784cb9aada71affe9b45
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious links and link farms on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan PDF. The embedded URLs, such as 'http://lnstagram-support.live/essential_surgery07ukh.pdf', are likely used to redirect users to malicious sites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/123?utm_term=veere+di+wedding+movie+full+netflix PDF link annotation
    • http://form-lnstagramcopyrightservices.com/by_the_seat_of_my_pants_definition8ad5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_600087f2a84ed.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/h0hcLgg/spectral_absorption_coefficient_of_water.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/haifjg4/wwe_champions_2020_guide.pdfIn PDF document text
    • http://1xbets-reg.site/invasion_modern_empire_hack._net8o6as.pdfIn PDF document text
    • http://merishwheelrecords.com/dropbox_share_files_without_logins5d2x.pdfIn PDF document text
    • http://afracheat2.xyz/rollercoaster_mania_mod_apk_downloadrxlr2.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/hfghrgd/sas_zombie_assault_3_hacked_unlimited_money_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_5fca9cacd55ee.pdfIn PDF document text
    • http://lnstagram-support.live/essential_surgery07ukh.pdfIn PDF document text
    • http://photoforce.ru/bose_qc_35_i_manualu66ib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5fd894e3c9fd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426812/normal_5ffb5dabe481b.pdfIn PDF document text
    • http://eurostore.info/paririmapidmuyk.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/5JCDEVA/lizilugumexozogi.pdfIn PDF document text
    • http://agent-spv.space/payday_2_best_crowd_control_weaponsuotxu.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/TLxV52y/jamafowiropi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamuriza/tawepesubojibudofuwona.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_off0000d73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 5024 bytes
SHA-256: 796e7335592c44b89464658603300e41a875239a746d7c17d073c1b4125f430a
font_01_sfnt_off0000e865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 10980 bytes
SHA-256: 938a35ed1ae433e226d8e675aeca29d82c423c555901ed5c1d133dcc14878b72

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