Malicious PDF — malware analysis report

Static analysis result for SHA-256 001aec823718fea9…

MALICIOUS

PDF

73.1 KB Created: 2021-02-01 09:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ddd236addc43e5a80f33ef817e5b96b SHA-1: 8d76ba34f05d45e9cf832b124d5c8f7fd1b3f14a SHA-256: 001aec823718fea93708096c37f23aa15413fd5be3887c174a28659e2496bcab
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=falls+lake+nc+rentals'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=falls+lake+nc+rentals In PDF document text
    • https://cdn.sqhk.co/xogedusov/vhbhgjb/79164265869.pdfIn PDF document text
    • http://tryadasert.online/john_deere_2210_service_manualzcv94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5fd18617b0602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403543/normal_5ff9625b502ef.pdfIn PDF document text
    • http://dkblogin-de.com/50086329100a3e8y.pdfIn PDF document text
    • http://itwow.info/zomudasemixemxrr43.pdfIn PDF document text
    • http://copyright-helps-team.com/begokujk0di.pdfIn PDF document text
    • http://telgrm.site/hop_valley_springfield_phone_number9inhm.pdfIn PDF document text
    • http://study-english-05.site/gakofokozefawajuleletivs72b9.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/lizuseguwix/android_emulator_for_mac_os_mojave.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/96127381417.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/fafudexufitoxirora.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/bilujitofosezefosutu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/28012209289.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD29 4812 bytes
SHA-256: 90f82da2d761d20033ab858d35db21512a2627c0493774cbdcaaa256b7ade6df
font_01_sfnt_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 10576 bytes
SHA-256: e60dc8325b55da7609d2e06c847e2d37faef8a4b064656a4ea67ffd3dbea8552
font_02_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 16336 bytes
SHA-256: db80dc9476d428f393f9f600c25a61569aea8a915210f75fbac1640b97426603

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