Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aeb67e488a5ff79…

MALICIOUS

PDF

67.2 KB Created: 2021-04-02 08:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6e22cbf4523b7b4bb4461eb7271f3bcd SHA-1: 5457fe3c32632d8fb70b6236a06fd257a2473c3d SHA-256: 6aeb67e488a5ff7934dcf5fd7069378729bc2f1c1cf3f624a7428498bed8a5d4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=yue+huang+yelp', which is likely the primary lure. The document body, though heavily obfuscated, contains text fragments that suggest a search result or document context, aligning with a phishing attempt to direct users to the malicious URL.

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://maypoin.ru/wix?keyword=yue+huang+yelp PDF link annotation
    • https://sasexonitit.weebly.com/uploads/1/3/4/7/134757549/094d1f.pdfIn PDF document text
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/kizotelir_dikamemutob_dofevuto_givoliv.pdfIn PDF document text
    • https://fipowawebes.weebly.com/uploads/1/3/4/6/134601566/9854720542877.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/54368539560.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/jofunozuzof/radish_production_guide_in_the_philippines.pdfIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_beeed349e6f64e9d94c2f6514737ff00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/xukeziwopijuwazepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257ecc09-ef85-4f18-af5e-ee1df1910bd0/the_dragonbone_chair_hardback.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05f8b7b-07d5-4431-ba9a-35d054fe76bb/the_rosie_project_book_group_questions.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_1f47f5998b874ae4a27a15ced0b3f0b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0618fb77-495d-44f2-9818-bc7a016659de/how_to_set_up_coway_air_purifier.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/99848644204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa1b2f1-85ab-4986-8ab8-b47083727569/87111599462.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/pokuzawup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5644dd7-c7f4-44fc-9aff-f64f673e7d0a/d-link_dir-825_ac1200_wifi_dual-band_gigabit.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_off0000cc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC22 4872 bytes
SHA-256: e70c004bffa4d175d6f07a1bf960cdffd9c2aee8b4e752d76a1c2a495fa47ad3
font_01_sfnt_off0000dcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC4 10464 bytes
SHA-256: f6ecfc2a1d1f20d934e6821696f7a337261c6d2db35e88aad37c83d200f1449a

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