Malicious PDF — malware analysis report

Static analysis result for SHA-256 800ea1bfe3bb4336…

MALICIOUS

PDF

79.1 KB Created: 2021-01-15 05:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 18eab2f43f15cd131410c3c496550c41 SHA-1: c015e95d99c8797dc839d1ca9429050d4fa87098 SHA-256: 800ea1bfe3bb433692ac7ba624b5c153bfa43c5c57e45da5460680b6c9ce2c48
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=diamond+groundsheet+pegs PDF link annotation
    • https://dijujuvosidig.weebly.com/uploads/1/3/0/8/130873718/jawofumefuto.pdfIn PDF document text
    • https://site-1201147.mozfiles.com/files/1201147/2600__emu_emulator_apk.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/a74ab02f.pdfIn PDF document text
    • https://site-1167928.mozfiles.com/files/1167928/france_simulator_2_premium_apk.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/9346421.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/bifjeAW/clash_of_clans_coins_and_gems_generator_app.pdfIn PDF document text
    • https://site-1178858.mozfiles.com/files/1178858/appliance_group_maker.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/249540.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/wedding_checklist_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/53617428578.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/bearer_cheque_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/keto_diet_cycling_performance.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_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 5340 bytes
SHA-256: b8a61033bf69df796661a62db17e1e0ef60e26017d6f7c78ea13e74c9105d17a
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 10592 bytes
SHA-256: a0220912e2e0bedde9e30d9c2572bb5424a2390620c4b29f725e0c8bfe31ee9d

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