Malicious PDF — malware analysis report

Static analysis result for SHA-256 1402f2008fe2c0a6…

MALICIOUS

PDF

85.0 KB Created: 2021-03-16 05:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c92e65f4f76d1246346fdfce55557444 SHA-1: 85146a21d63116560b4cf04d3e002abdb57ec627 SHA-256: 1402f2008fe2c0a635b53d13bb28d4303b2377cb3358dfaa069a908cc09c9661
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 0.9994

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://jumiwimov.ru/wix?keyword=737-900+united+safety PDF link annotation
    • https://lizuxafemow.weebly.com/uploads/1/3/0/7/130776517/zavanosumutipoj.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/5180324.pdfIn PDF document text
    • https://guxafosiwu.weebly.com/uploads/1/3/1/4/131453681/c1e8524.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/94790405609.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/rumogetex_nivoja_bavepolivixope.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/7f77b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485935/normal_6038ecf6c0fa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5febc2fc620a2.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/gokaxij.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/1a55b1da3c0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_6041325d8f8e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_602f6bdf5d90c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fc97de573c38.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/a4d1cc59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_db546161d1c844998298f950c7cc1f2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0544f2d-1b55-4b94-8be4-7a5621a0c1e4/rexujugebopakejepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ca2299-b11c-405f-b705-29ec0729c2cd/baumgartner_and_jones_venue_shopping.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/what_hot_sauce_has_the_highest_scoville_units.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_356ca3c8096a40f281bb601a64d4218e.pdf?index=trueIn PDF document text
    • http://vidugozu.atwebpages.com/30299113718.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_98ad1242dbb04f79a45e23a5286ce49d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd9ecd0-d3ba-4add-9942-01cb9c107905/being_in_love_osho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24019099-0868-4314-87f0-50c037b44b3c/hiking_merit_badge_book.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_off000110c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C0 5352 bytes
SHA-256: 19bf15ef730ed0d367991a7831cdbc4950cfa0d0ce69e1ee4ec1b3b9829fe28e
font_01_sfnt_off00012319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 10488 bytes
SHA-256: 8b36aad10678184ac41efecb07aeca641b9492490b2cdbea2a53c6e3d2932ab2