Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e31a2d72d2f941…

MALICIOUS

PDF

86.8 KB Created: 2021-01-04 00:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3be12a0adbe5e5d94ed5a6306751135a SHA-1: 937346749793f3c5f380bc142ff3295365758962 SHA-256: f3e31a2d72d2f9418148051d4f9a0f502b5ee84bc6c3c05104adb19bfb4b9fa1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to trailers and app downloads, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://traffset.ru/aws?utm_term=jabariya+jodi+trailer+hd PDF link annotation
    • https://cdn.sqhk.co/xopigotax/iiihihl/xadejigilowodol.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/jfjeaPZ/street_dunk_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/saxedade/zTticjc/jeganiferawiduzogobuge.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/QvUmihc/vagavilawekis.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/jamoxulo-gitejow-zoxitenol.pdfIn PDF document text
    • https://jixevimevulu.weebly.com/uploads/1/3/4/6/134659689/a656b4.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/de980ddd-955d-45e8-a19d-af49e57115df/jelanafile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924a34c6-e803-4376-8b97-007df6e17875/fake_random_video_chat_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70bbb1f-e018-4b6c-a927-ebcf52dbd03b/39156935445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073af724-36e4-4993-92a6-80e5d61a8407/abnormal_psychology_an_integrative_approach_8th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/budget_2019_expenditure_report_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8c9bb1-9ed4-4064-9ab4-73528c9805b9/35204356919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dff3a2-a5f4-42c8-940b-06ee97f3fd08/3401372563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b76f908-550d-493c-ad8e-8fe6feaa4464/ninirivaxanemafifi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 4724 bytes
SHA-256: 86d362f989f4088bc186de9eb6a547dd06d33c59bb27820ffa64ef623d799e6b
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10896 bytes
SHA-256: 2f0208ff5a6cab403e181fe8d239e4f035d93507e8339fb48c4f8a68fb664592
font_02_sfnt_off0001166e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166E 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00012b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B83 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_04_sfnt_off00013983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13983 5740 bytes
SHA-256: 0f73b596adf635c42c9996214458c369b669d2b75adf85c1748787686806d26b

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