Malicious PDF — malware analysis report

Static analysis result for SHA-256 c184c1ec08b21979…

MALICIOUS

PDF

81.1 KB Created: 2021-04-01 01:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecb6169dbca20610d28c1bbf43c8cdd4 SHA-1: 9b50e5f28415f746b26d4cd5db545e186896c265 SHA-256: c184c1ec08b219797538a9ec9fee1cf39e7f86c6a2e17542dae452e22bf0d13a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://pelibifir.ru/123?utm_term=waka+waka+song+by+shakira PDF link annotation
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/6e617b570b68.pdfIn PDF document text
    • http://tamakar.xyz/tutipomuromurjnd9.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/4633623.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/21ac11c858.pdfIn PDF document text
    • http://flymoney.net/mutant_genetic_gladiators_apk_mod_downloadqvjfn.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/wiwamoxamo/21305016935.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_913b67f96af649bca25327d3b4f70610.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49eb8d5e-8291-47e6-aa7b-e3cc79518859/lezomugozuzuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d02cfb-6ec8-4a6f-9fb0-840393c5c891/29872652907.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/tezelalafusipobibad.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/restroom_pass_sign_out_sheet.pdfIn PDF document text
    • https://633ee4a5-ef7f-4c35-8c02-ac6c60bc6361.filesusr.com/ugd/0ab374_335a884f74ba479ba127ea8e10f9e574.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/gekeje.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/aspentech_annual_report_2018.pdfIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_34694c6cd7e24579822f7101ba4657c9.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_e25ed953fa764b748bde1bb3ae18461c.pdf?index=trueIn PDF document text
    • https://5a20c861-23fd-468b-888e-078c5342874f.filesusr.com/ugd/924841_a9cb444d8e2b48029ee47b63cd094ec3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a9b24b-ab0c-46d8-b72c-c432e3db5394/61082863624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6507be-8393-4d7b-9469-d9bef81f2efb/thinking_like_a_lawyer_colin_seale.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_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 5324 bytes
SHA-256: aa320d0d9413307efe7061302ce2046bbce40fe5b80f5bd4688f517ca8366637
font_01_sfnt_off00010f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 11996 bytes
SHA-256: 4bd82aa066a46a0a116a645c224b169cd8eb58ff65dc87baac8c6c3f10d3bad7

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