Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b03be22f4b9ecc0…

MALICIOUS

PDF

58.1 KB Created: 2020-11-05 00:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 854182a2af63ad243bd544494f8e43fd SHA-1: 1f1c257012267ad740b6357b6d058be72b0e5654 SHA-256: 7b03be22f4b9ecc0a4742eca5dd281f88a6e6fd55090b0002aae622e7c889b75
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to PC speed testing and includes the malicious URL, suggesting a lure for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=test+my+pc+speed+for+gaming In PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/faxujaxemizedugoxi.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/eed58c2.pdfIn PDF document text
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/a6f08fd4d4.pdfIn PDF document text
    • https://kabolonopatine.weebly.com/uploads/1/3/4/2/134265344/7859971.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/patotale/6407692646.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/yeti_coolers_reef_blue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdd2ca6-cf65-4a01-864d-3d5d656453ce/2007_mazda_cx_7_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ed0dbe-ce91-4132-b480-4595aead7da1/hsbc_bank_of_nevada_lien_release.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/vumexixinevifutigijiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/three_gorges_dam_watershed_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/kayla_bikini_body_workout.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_off0000976b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976B 5284 bytes
SHA-256: d04113ad1dcd07fb12dd5e7eacddbda967db0da6d8fff3b56496cffbf88b7390
font_01_sfnt_off0000a951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA951 10676 bytes
SHA-256: 9c78462629a3c1a401705cf998ca090d2703124129d82d4160fc7a047629ee26
font_02_sfnt_off0000cde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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