Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f5ae8e64e6b883…

MALICIOUS

PDF

74.2 KB Created: 2021-02-25 12:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c30d1024847f7482385f05ebbca7f037 SHA-1: 5f6f8a06a089f3982f40be9fbd853667d17f74ae SHA-256: b9f5ae8e64e6b8838e5f252c9d05d5bde70a29d576b1b5aa094f706151d28111
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure.

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://druttle.ru/wix?keyword=graco+forever+car+seat+cover+installation PDF link annotation
    • http://manovina.mypressonline.com/2012_grand_cherokee_overland_value.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/71607666405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412583/normal_6000bbdeb1a63.pdfIn PDF document text
    • http://trellos.fun/68384088939erug9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_602feaa3e934b.pdfIn PDF document text
    • http://detonic-deutschland.website/how_do_i_program_a_clicker_garage_door_keypad1x165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474169/normal_5fdef5994a129.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/gagetopurefepulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393908/normal_5fcb98ba4cb16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikawin.rf.gd/spatial_data_management.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/rancilio_silvia_pro_coffee_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/mijukolawunix.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/fulixeruwesaduse.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/sodatotopigizivemukewa.pdfIn PDF document text
    • http://dimebuturerab.epizy.com/jodofikagutakasi.pdfIn PDF document text
    • http://pekuvem.epizy.com/moxesuboxotunuximare.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_off0000e86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 4964 bytes
SHA-256: 9088a59e754a0722d0e2240651963613d5ce6300421830b0c2c43cf21f25ddc0
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 9932 bytes
SHA-256: 83be483207216a67af4731d33900780ac7df0c8e92c99a34869b19f0d1cb22ac

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