Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfffb8e9130a13a…

MALICIOUS

PDF

81.2 KB Created: 2021-05-24 00:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e130e886b081817b73cc1d9528d10143 SHA-1: d7237a731dd0710e4b80012b7625141f4de0f641 SHA-256: bcfffb8e9130a13a41206a4b608d2d14fcbea33cf4ac650ec66b6a69cf49d515
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+attach+stokke+tripp+trapp+baby+set PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444630/normal_5fd8a2568f2e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_6039d10da3a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_606cf21d44a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_602661e52def7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_600efb0eb9ef5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5fcc84abdbca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_605add9e631c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_603d525a586c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_6042090553a8a.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/2203500.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/5446520.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/f25ef69e-39a8-4183-ab16-106a67d95e25/what_is_the_concept_of_peace_in_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/bluetooth_dongle_driver_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684e14f3-7a74-4d20-a2b9-ac40f34e45b2/murabulurufirezuvokaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc56bf78-0d10-4401-9552-65608ddb33f4/simple_and_compound_sentences_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/sateditigugiwudesagaveful.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/51033377038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5c9570-497d-4c4a-a1ba-006d4b892db1/mojiwigafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9ab756-988c-4ff3-9318-dde6bacd68c7/husqvarna_yth24v48_blades_wont_engage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0338b24c-183e-4a94-a64c-f297c5171755/lg_47ln5400_manual.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_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 5348 bytes
SHA-256: c876fd9320aa2b3e052290a85936e2104033ca83510086a0b5547064e4284315
font_01_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 12180 bytes
SHA-256: d2088fc302cac1308e0408e7858d03b1fd6131b5e063e59dec985f9a914531a5

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