Malicious PDF — malware analysis report

Static analysis result for SHA-256 922784f1688ec0f2…

MALICIOUS

PDF

86.4 KB Created: 2021-03-08 18:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 069afa073abad3877bd47df17af7b3e0 SHA-1: 1696e276850b38c1d4914ddd38d9fe7b3da344a8 SHA-256: 922784f1688ec0f26d809beb8b5105851b1963acb3693a1f482369083851b1d8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dugedepap.ru/wix?keyword=spider+man+far+from+home+free+download+tamil PDF link annotation
    • http://everydayy.fun/113727059742h8n7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fe9c649e503b.pdfIn PDF document text
    • http://storeyou.store/navy_pre_deployment_checklistla2v3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_6020798f8897e.pdfIn PDF document text
    • https://fasukawoj.weebly.com/uploads/1/3/1/4/131453618/cd3ca4.pdfIn PDF document text
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/06bfbce23b25d.pdfIn PDF document text
    • http://cheapkeys.site/994924127814tjze.pdfIn PDF document text
    • http://salea.site/mepatowwath.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/61c4e2f983c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5feb28c23217d.pdfIn PDF document text
    • https://wuzesitawe.weebly.com/uploads/1/3/4/7/134733123/sulazakudorilujokiwu.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/6013957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_c3570f984fca42cfa9e7ebd2a73d4bea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a3860e-1a78-4813-b305-aa89bb4eeee2/serigijog.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_09b5d8de485e461d81d8be8b4f6ddf9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c07d115-917b-466e-8c68-07818a86f0c6/jvc_super_vhs_camcorder_tapes.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/78358649853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b87ff2a-2f30-42a1-9798-2d7acb5ef392/white_christmas_song_covers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6962e87-0b03-44bf-a32f-589238dd443c/11630702717.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/ep_booster_18v.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 3764 bytes
SHA-256: d949c0cfcd767e04cfc68d0faea13fc5244bd7e11c86ccfe6b476c72e9ffd831
font_01_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 5296 bytes
SHA-256: 67958eea3c74893a2066a2ed9692fb0643448d66690f1e671f56de669ed84083
font_02_sfnt_off00011166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11166 10816 bytes
SHA-256: f585ac8cc14546689fdd1db0c4c97b324193c575f0a048c7ee6c4efd194a8087
font_03_sfnt_off000136ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AB 16076 bytes
SHA-256: df8916dc0488248139c8b7f8575cdad52201066875df9eb3f38f8be7ce625b0f