Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02adf35aaf52e2d…

MALICIOUS

PDF

109.0 KB Created: 2021-03-28 09:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 76e31174dac4778abe851ed1dc479999 SHA-1: 6685fdf47dddab5b7fe1a6f638171ba35e8f1801 SHA-256: b02adf35aaf52e2d434c21e119aaf80cdfbdf6bdf712f93a852a1b4b5d4983e9
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, a common tactic for phishing or malware distribution. The embedded URL and the link farm suggest an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/award?keyword=dubai+metro+map+pdf+high+resolution PDF link annotation
    • http://zibodotuf.mygamesonline.org/nakatixofade.pdfIn PDF document text
    • http://paxenazubenib.mygamesonline.org/lg_top_load_washer_error_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemukiguwuw.myartsonline.com/sigozusidurunumelip.pdfIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_02e38e6393d64b2c8fb4a315a55252bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/film_anunnaki_2018_sub_indo.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_dd03e67a29ab44c795b26d38009de962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/texobigiwofiwot.pdfIn PDF document text
    • http://mepitar.atwebpages.com/58561995329.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/pipuwomamelute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0865cd8d-0110-4fe4-90f9-eed4806cd338/stock_and_watson_econometrics_4th_edition.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_5979247766fb4038a50b5b63ff236445.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_bb25f0858ab24b83a65df40612b6a832.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c064c6c4-4e10-4e88-b1d4-033807b2cb4c/how_to_make_a_vr_video_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5284b41-5bf0-45c7-b128-906e3f8b7024/bow_tie_pasta_and_chicken_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/angularjs_material_admin_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6365e8b1-2da6-494c-997c-d8f1ca8bb5aa/23779220760.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_cd0f992ed3ad4b6f913fca148edc287a.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_c740a6955af84eb294b7ee9b2eac1249.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c15ce1-66f0-420c-81be-83858d9e30b8/93041356854.pdfIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_d4dd17e5dddb4d9cb27f3de075d41b10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c203ea93-48ea-4c5c-b794-6eac11b40db0/22548904666.pdfIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_0a565a08a22340f2aec4a9c2d8a6f75c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/77787600472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78757a44-3669-46f8-ae73-1d07aa7a6536/56120669075.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15314 5592 bytes
SHA-256: aea65e6376d415bce056f6fdc650b40f1fab9566816435b46011cc9fbec0c6e1
font_01_sfnt_off000165ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165EC 11676 bytes
SHA-256: 7037799146da7627e35ee7ee504138a26a661ebed68c900c9ec9a3cbaaa4a0d8
font_02_sfnt_off00018e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0F 16840 bytes
SHA-256: fa8325bc52551a5c313cc9491adf519ee0e2f5d6b80ec5101608a83f09f8fbda

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