Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ad1819e0597b31…

MALICIOUS

PDF

63.7 KB Created: 2020-12-16 01:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 38e5ea38745ae70a8d959e330fcf7157 SHA-1: d7cd0dfb01f253ac475952a8ca8ac47e10611f1b SHA-256: 00ad1819e0597b31efa6c7718b7bb35b5f102ad42fdb94b60cec4736dbc13a73
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of external URIs and a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristics, point towards an urgency-based lure to encourage user interaction with embedded links.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/aws?utm_term=ny+dmv+forms+eye+exam PDF link annotation
    • https://xaluromaw.weebly.com/uploads/1/3/4/8/134862284/notulegaxeve.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/6541200.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/9855658.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/zukemasiv_xuvapufajomo.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/02ee9cf7d273896.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/baberininaj_risesolakel_powenire_fipawebuno.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/a6caf02969c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b99bef9-7273-465f-934b-f86cc4633f64/45440936212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae91915-656a-4b88-a27b-768345c03216/boguvefabovatevilujolap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db4db8467722f1f5c10b/t/5fd21eb4b0f0f842d7ae484f/1607605941204/fake_call_from_among_us_code.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/ar_carry_handle_red_dot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d2011f6a419848fbce5/t/5fc915752a530c5aaef664b2/1607013750172/porsche_driving_experience_los_angeles_price.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/zixexinojat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d2661a-d7a2-45c5-8e0c-243c3e0cf00f/vumimomakebipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fe0c6f-3ff1-49a3-a9cc-5a979a53059b/79873734709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20b499b-b71e-402f-9860-4ba2b5905ff0/sasefobedalaxazeleni.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_off0000bcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEE 5220 bytes
SHA-256: 0088fed2a24dc639512eff13bb43e3e8996834dce50f0c4a002f323ac7ff2edf
font_01_sfnt_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 10436 bytes
SHA-256: 2d656d806eb9493c10ece28795be3d6d9480263abb489bdbee4902f35119579d

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