Malicious PDF — malware analysis report

Static analysis result for SHA-256 042e76e8ba6a00c7…

MALICIOUS

PDF

99.2 KB Created: 2021-03-04 02:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c374b35b4e995797eb977b5187796dbf SHA-1: 442b7ae6b458d29d17bb82da7ceaaf21216849ea SHA-256: 042e76e8ba6a00c733a84d4b06cfee1a34272cced643825bc435417fbc573e55
126 Risk Score

Malware Insights

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

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the presence of external URIs and the overall heuristic profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=what+do+buddhist+prayer+beads+mean PDF link annotation
    • https://cdn.sqhk.co/pigevikuwi/4rjchiN/nail_it_down_meaning_in_english.pdfIn PDF document text
    • http://rodsfish.club/foguxujixuzulolaposogizh4cke.pdfIn PDF document text
    • http://jugatilewe.22web.org/fujeranuwajifuvime.pdfIn PDF document text
    • http://ifeelgood.club/83163771927z4izk.pdfIn PDF document text
    • https://cdn.sqhk.co/najuvotuwoz/jbCRhcg/zonebixitonevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404990/normal_5feb0b4761f5b.pdfIn PDF document text
    • https://cdn.sqhk.co/jegetito/jTugjiI/1228824964.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/wiarjgQ/65762871190.pdfIn PDF document text
    • http://samettemiz.xyz/527456140740p1q7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_60122038a136b.pdfIn PDF document text
    • http://merishwheelrecords.com/79520748383qz4mu.pdfIn PDF document text
    • http://helpforteam.com/579414621055ccau.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/topumidajozapore.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/chevy_auto_to_manual_transmission_swap.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_do_i_apply_for_michigan_medicaid.pdfIn PDF document text
    • http://sawuliwinupunud.epizy.com/92479470497.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/before_anna_todd_summary.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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11594 6324 bytes
SHA-256: 7add2219fb76ef46c104b2015c1d63ed340d731d910ecc2b6ab092b9b723b8b5
font_01_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 5420 bytes
SHA-256: 3f7aa0e4b2dcf7ccd38256a1672fa9db922f9f6b61b31a5312f3d94f4f5ea443
font_02_sfnt_off00013d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2E 12348 bytes
SHA-256: b0eefed1f6dcca2459b256efc6e39d7af1d85b39ccd94aa14ac4dbf9123769e4
font_03_sfnt_off0001652f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1652F 2492 bytes
SHA-256: e145846080c0066e8f972933f16019e3719c959367ad671e4669c901cf59cedd
font_04_sfnt_off00016f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F72 4496 bytes
SHA-256: 247f4e6cbc69c002ba8ee30cdeabd2fd72b696b958d4422dae86e72131221e9c

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