Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bda3ed9ab2b6a0…

MALICIOUS

PDF

96.0 KB Created: 2021-06-07 05:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b92583f6e66918a435204b14ec9c7d80 SHA-1: 03bfa221782b845d826b6bdc9075922a02ecd47c SHA-256: 69bda3ed9ab2b6a0c77fbeb056ae61289ef7f79a98551c4ad5e089b5635a4ee4
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://nipisod.ru/123?utm_term=christian+worship+songs+2018', is presented as a Christian worship song list, likely a lure to disguise the malicious nature of the document. The PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://nipisod.ru/123?utm_term=christian+worship+songs+2018 PDF link annotation
    • https://mozimokitazipa.weebly.com/uploads/1/3/1/4/131407977/vutunibiw_fedos.pdfIn PDF document text
    • https://witufulovavivoj.weebly.com/uploads/1/3/4/3/134351467/getuxe-vedosanu-xabidukoxozerek-lituluwawe.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/0dfaf7e621f.pdfIn PDF document text
    • https://viwejabaru.weebly.com/uploads/1/3/4/7/134749074/jagitepasava-zemiduge-girunov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_604cdf5fe2c70.pdfIn PDF document text
    • https://vuzupugum.weebly.com/uploads/1/3/1/4/131453250/ninomozob.pdfIn PDF document text
    • https://lonewarole.weebly.com/uploads/1/3/4/5/134593790/5e55299b97bc6.pdfIn PDF document text
    • https://rasasagodum.weebly.com/uploads/1/3/2/3/132303335/sumupewaxosejiranez.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/razezelafofaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_603650a01a595.pdfIn PDF document text
    • https://zalewuko.weebly.com/uploads/1/3/4/6/134604420/fosoxaxemizozu-sifavuwa-sedul-nizepajevaj.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/114d4fdd-b1a4-47d8-9373-ce98e2c70f19/nolalota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6416197-0e95-41d3-9c3c-a6082085a00d/39460612898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4f7fd7-ea85-4fd6-9fb1-e52e69427f82/why_has_my_kindle_fire_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ab7b60-f92f-45ee-8b63-fd26d51010ec/57164425506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421ea413-1a32-4f79-b65c-d37108d88f3d/vesubive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edad565-ab2c-4240-895a-d8b42215eab8/44621104429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df73b6d-868c-419b-9754-d92eac9fb502/34140681322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594e2c4b-2912-4100-bc76-9f3365b50847/is_boss_audio_systems_a_good_brand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ef7dc9-2d12-40df-b39e-772f7b2098a2/vafopudogufenum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094b29ad-b670-406d-a151-a479166ce441/brother_hl_1110_error_light_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59a98ef-654c-4b21-bd41-87b84f356cf3/can_i_read_an_audible_book_on_my_kindle.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_off00013af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 5568 bytes
SHA-256: 6f3066490fee3cf02d4c50df3901d6dec82a008c90322b027234067c5a69d98a
font_01_sfnt_off00014df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF0 10812 bytes
SHA-256: 64b2a850174541cf43884ace25ed1722e6fa3a3c33d6363d1533a67ed245427f

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