Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62bb2a4be355659…

MALICIOUS

PDF

71.8 KB Created: 2021-05-05 15:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5bd7fdf8530c0dfd07c3e9dc956a9e86 SHA-1: 664767c7e2cda5968265a3e47faa24a75e9b7624 SHA-256: c62bb2a4be355659153e1c45e41d51dbf9d21fd99fd60527c42c51e38c11644a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to 'fokemale.ru'. This URL is associated with a keyword search for 'christian dream interpretation book pdf', suggesting a lure to a potentially malicious website. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting the malicious intent. ClamAV detection and ML classification confirm the malicious nature of the file.

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 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://fokemale.ru/wb?keyword=christian%20dream%20interpretation%20book%20pdf PDF link annotation
    • https://cdn.sqhk.co/fubafonu/jhjbcEs/olympics_2020_logo_plagiarism.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/d286221fdc62.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/EB3shcp/facebook_app_deep_link_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/XhfZhi5/.pdfIn PDF document text
    • https://zuvopiramalatug.weebly.com/uploads/1/3/5/9/135981479/8872942.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/175c7874-0eaa-4b66-a2a1-5c723a8cc2db/63560050172.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/67922317934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b8c8b4-90de-4190-b7d0-0d9491b962ab/badaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9252f3-07d5-48aa-8eae-a780a38d919b/frigidaire_affinity_washing_machine_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc097a17-0546-49b5-8160-202a8a5ff20e/how_to_get_into_bios_in_lenovo_g50-80.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d2c42f-1c0a-4578-adee-b66e01ed87cc/flowers_for_algernon_book_common_sense_media.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/ratix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40173aab-7922-4ea2-875d-787085cc2c84/what_are_human_trials.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/yahoo_answers_pregnancy_and_parenting.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/fuwobugixalifos.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/sajebot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e579cf24-7e8e-4193-aa89-3836efbb5dbe/monster_hunter_illustrations_3.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/doom_1_bfg_edition.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_off0000d974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD974 5356 bytes
SHA-256: c1fa8a85adabb3dd8d49f21f607cc051fa8608d320269758a031b8317cce80c6
font_01_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 11912 bytes
SHA-256: a89c006c77ee1b5914533bcdb16615255f9f4cd8add9d8fda4b159e44e376a97

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