Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cfedd6d4fcb92f…

MALICIOUS

PDF

73.6 KB Created: 2021-01-06 11:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 42a26310b2f6bdb7250575efe7675795 SHA-1: 783a6edd8229f6cc0061e7fbcfc13f905b24a2fa SHA-256: 06cfedd6d4fcb92f74c1ac7eca9f15cfc78e1802ec7ae775fec756f30b4ede9b
244 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which are identified as malicious redirectors or hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the true destination or to generate traffic for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=anari+film+ki+ringtone In PDF document text
    • https://tumunuwixa.weebly.com/uploads/1/3/1/3/131384432/pukok.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/WY9UMM0/bonirilotoves.pdfIn PDF document text
    • https://bexulijariva.weebly.com/uploads/1/3/4/8/134885506/9830666.pdfIn PDF document text
    • https://paxubemimowam.weebly.com/uploads/1/3/0/7/130739876/6537485.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/b4960f2424a0ba.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/zutat.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/ILThcgc/space_armada_galaxy_wars_offline.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/633a9120-6ddf-43a6-aacc-b8dac1bb2825/basketball_shooting_drills_without_a_hoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8beaf062-2579-44fe-afc8-abcd5497f0e9/dreamer_ozzy_osbourne_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/zaxivujozisave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2b7c82-6c03-41f1-b9e9-9bf21f27e802/persona_5_lovers_confidant_gifts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82e7d49-4595-4a09-97a0-8bf5e28029ed/kekuwiseganusatanut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2173ecf2-97b6-48fc-91fe-619ab6de04cd/gavuxuveniju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefe65cb-116e-4496-a7e7-9fe562dd17cd/44965096538.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fc54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFC54 18576 bytes
SHA-256: 5645765a38aa057675aabd8c7dbf4b61a02dfe8cc020023119b74cc2f5411a62
font_00_sfnt_off0000c874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 4960 bytes
SHA-256: 72700407d9385ed251c15116ade5426bcb72700cc213fad09e1e97af62e7ffa1
font_01_sfnt_off0000d948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 10216 bytes
SHA-256: 0f9c05fbffa63ec692a966bae980a11384fc4bba1ca721210313f4949830048a