Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ae2e86f937f49d…

MALICIOUS

PDF

85.3 KB Created: 2020-11-17 21:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0156ecacddb6624cbed031cddc769716 SHA-1: 53d775e6268ad51a0978405314603c3d238d62ab SHA-256: 61ae2e86f937f49d18e1106774b7d850488c81a4552bbb8d8fef679e75cf1b06
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to product manuals, likely intended to trick users into clicking the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=saeco+intelia+espresso+machine+manual In PDF document text
    • https://faxuledobiwud.weebly.com/uploads/1/3/4/3/134311760/2fe109d4e.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/8e9448c9d4b87c8.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/d2b595e11f3200.pdfIn PDF document text
    • https://bajazari.weebly.com/uploads/1/3/4/3/134314741/jobaseguwunak_numomawem.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/dbbd75f0-987f-411c-bef0-f619334ef96a/pilezepufiriwopilusan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6986dea4-8b07-4d33-9330-9603d8065083/wozamigotetivivimuju.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/cancionero_de_alabanzas_cristianas_con_acordes.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bejokitebix.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/nibirekezugulewizatupit.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/apc_ups_manual_bypass_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaf2390-3337-466e-abee-b47cd9d36261/36934687434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a552e4d8-e9a3-4ff4-be47-2766afa55bb3/simafukosate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d480a754-9b3d-42e5-920c-43acb1aecb7c/lipajaxuwoxovekup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f789dd7f-aed1-4fab-ac14-2023a893ccc1/pevajavatomumowodono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c754920-241e-4501-aea4-8a029b3db8e5/4_letter_word_with_c_as_the_3rd_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/xewekomi.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/gitejabufenizifiwe.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_off0001130a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130A 5276 bytes
SHA-256: 9809cc7ba8a2c57f96b98d22e9693f592b4a6bb85a5895f4658a2d45aa03fa8f
font_01_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 10368 bytes
SHA-256: a91fc0055abc1a42e696d1c5a246bab04ebce74d614e71b38828c8fef5ff04af

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