Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a6a5d7f1e91470…

MALICIOUS

PDF

72.1 KB Created: 2020-11-11 13:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 295e9dfa225ced8197ba03769f9633c8 SHA-1: 2baabfeed796427636a1c43712353e5e6f51d529 SHA-256: b8a6a5d7f1e914707068e2fb11118110168da8135c774fb8971a275b0530e413
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 0.9997

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://trafficel.ru/123?keyword=john+deere+self+propelled+lawn+mower+parts PDF link annotation
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/c2c6a69a5e00a3f.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/7598612.pdfIn PDF document text
    • https://fazulozuxili.weebly.com/uploads/1/3/4/6/134625369/9969aab1.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/mobidebibi.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/5074942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ec2eb307-2605-458f-bd05-ce009d36c940/jetarawudubipuzepizisaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/ropuritabewifupib.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/zapufixawutetexabususoba.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/global_credential_evaluators_contact.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/hp_2311x_spec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114887d4-d610-4000-96c7-505bd2f91128/vunaritajepidumabif.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/unfu_k_yourself.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/61559639494.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D7 5100 bytes
SHA-256: 3e05ea9e6c3ce46971d79711e5edf859194ed046e03d44940d656b9cf10550f1
font_01_sfnt_off0000e209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE209 10260 bytes
SHA-256: 46ec96f512d6e64a7e1a3daf7e2fad312fdf74ad11705cbb7ded0ced185bb44d
font_02_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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