Malicious PDF — malware analysis report

Static analysis result for SHA-256 a782a9c82be58629…

MALICIOUS

PDF

86.6 KB Created: 2021-03-09 09:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3b01462894a0950cdc488bf80c0c13b2 SHA-1: 8265db0eacffe4c19210cfff56c3185bb552f8a0 SHA-256: a782a9c82be58629ab2f974cc6e38d115915e096e063ea1fd0e771509cdd33da
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a domain associated with link farms and SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/award?keyword=2020+porsche+cayman+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459185/normal_6004fb4886909.pdfIn PDF document text
    • http://zatoboyvibor.fun/king_size_platform_bed_without_headboardac2a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_60052a9d75265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_6024067005ccc.pdfIn PDF document text
    • http://sy0n.icu/gawerep02ds.pdfIn PDF document text
    • http://vinograd.io/adobe_reader_apkeup7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_60028dfc09f02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc9fa0b3bd58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5ffb926baeeae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_603a665222e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fee39a0ed72a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_60062c1716d0d.pdfIn PDF document text
    • http://haifaiv.ru/214725934388eiin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fekife/xolojigusufubewoxegeken.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_bd4756f04cf74422b755462b98312299.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_cc5d4c739e10470baf83391157a4b0a6.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_407ce99f34e84e7f9d37fa6638948092.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_c660b14772594090b3553dd362304e2f.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_1b24ebfbc6314881b8e5f85ed422d524.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_039dfd6e614c4777b8fea1331de24147.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/26511482903.pdfIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_172fb23958bd4d0497ad43961abb9799.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_6b885efc18dd4e00a0f3a23218efd745.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/david_marquet_turn_the_ship_around_animation.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_828b7b87d9114406b3ed8528de909e2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/sepuzifanarikojasex.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/basler_versicherung_ag_annual_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 5428 bytes
SHA-256: 51a721425cfe2c488dd50f0cb75e82d7b25daffe448643c901f2043a0c42624d
font_01_sfnt_off00011a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2B 10632 bytes
SHA-256: ceb47ed06915a2e2c75c19a080402a039136ca880e6f7a2a755c5d87d96f29c5
font_02_sfnt_off00013e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E80 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176