Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c1ddf90fe3a0d4…

MALICIOUS

PDF

97.2 KB Created: 2021-03-23 02:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 220c321a6500a63f01635ad8e95de0f7 SHA-1: 2d3da7ab5b346dd8b62daa05af572c62ca86624b SHA-256: 60c1ddf90fe3a0d4d36a30bbfe9702b0e381126d73c8b91f596af7ebcf96b0be
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 0.9997

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://xajibur.ru/aws?utm_term=spell+book+d%2526d+5e PDF link annotation
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/popezarabesobukizoji.pdfIn PDF document text
    • https://tonezukem.weebly.com/uploads/1/3/5/3/135348251/gidurojej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_60293290aaa5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5fc702ec10919.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/zotilavuxo-demin.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/2028505.pdfIn PDF document text
    • https://fugazuxelodurip.weebly.com/uploads/1/3/4/6/134639195/b2769bcdcf7.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/bopijeku.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/puxisu.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/xexegezinodobu.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/8123261.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/mudidu-safok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_22523ccf4cef4815a9865d2c3ff12bc9.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_5af09f89ef3943b1ac0f17876f561d10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b893c94-03cc-4e16-b98d-25dd2600f967/tizoxusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac0db0a-dcbb-4975-87ea-3341b2937770/99104935892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438423b4-8cb3-42a3-bcad-29d37c3128ac/57882739832.pdfIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_732f445231304664b3fe4ac8ee185f19.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_42156be1c63b42ed94b2709ce6a9163f.pdf?index=trueIn PDF document text
    • https://04650017-3ca5-4b28-9d9b-11da2816551d.filesusr.com/ugd/aa03de_a0e9f646cff9451295d17b91ab50a6bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/737d142d-0f3b-41a7-8b81-619170c492c5/the_essentials_of_computer_organization_and_architecture_5th.pdfIn PDF document text
    • https://ebd157e6-94c3-4ff5-b3ab-516f87acbde6.filesusr.com/ugd/e87473_59504074aeaf4f609f61f9dd2f138925.pdf?index=trueIn 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_off00013ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF2 4776 bytes
SHA-256: 2ff507716463e888cb3cad0cb3aa995261bba42e17dd1beae941d5ccd7578e4e
font_01_sfnt_off00014f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3F 11956 bytes
SHA-256: 89d4fc540a3e9edc6dcdcfbf2b057ac7592b8d6e9ef47fb9c2dce5ac1f854b05