Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17fb34837e638ec…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 13:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2f283dd4ea2d7caa459470737c655adb SHA-1: 30ec613714467b5d48f178765ba39e7f855508ec SHA-256: b17fb34837e638ecd86975fbe568068203439adb717566f7ad04d122b1c33321
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or scam attempt. The document body and embedded URLs suggest a lure for downloading a PDF, potentially to distribute malware or conduct further phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely involving the exploitation of PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=chosen+at+nightfall+pdf+download+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418984/normal_602e23aca08d6.pdfIn PDF document text
    • https://wegidakalulat.weebly.com/uploads/1/3/5/3/135337254/gazoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fd643b0eb631.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/91974001166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456398/normal_5ff0162132f08.pdfIn PDF document text
    • http://accface.in/deninekurirytc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fea23453d287.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/0dec434880aa.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/tintura_de_barbatimo.pdfIn PDF document text
    • http://kudretbozaci.com/construction_project_manager_interview_questions_and_answers0djsn.pdfIn PDF document text
    • http://damita.fun/31565968422fcijn.pdfIn PDF document text
    • http://service-hire.com/bawuginadumatirugiguvutuvti5lb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452161/normal_5fee71671bd3e.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/xunilukegez/zaxowopusewusej.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_1dde99cd81194f6c9c97cf5e2d3d665e.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_1e8421a4944043a988c563bdc4ec534a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/nowegenoxabazevudogepevan.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/gesto_do_risco_de_crdito.pdfIn PDF document text
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_91c9465e6e4d4626ab6433d1703764d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupojakami/android_box_magicsee_n5_max.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/49535294562.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/hotpoint_gas_range_manual.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_a6b9abd8629246dfa9ba20045adfcee4.pdf?index=trueIn 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_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 5300 bytes
SHA-256: ea5cdbb0fe092fa659d36eb2636d65490f16e3012e49fca2595aa57fad010c2f
font_01_sfnt_off00010e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 11128 bytes
SHA-256: 21687753ffac4a0febac8e5f2b61392173cb5d12c41dd10a86fed9eac512be53

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