Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62961fc6620325f…

MALICIOUS

PDF

59.1 KB Created: 2021-01-24 11:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a49dcbc1896e1e03f0dc4c169d949274 SHA-1: 24ab5ebabd37958d096e9207d9a2be0ceaed154c SHA-256: a62961fc6620325f2936bb22ba7ba6e61c13c2dacbda87df355a6e8870bcc63a
212 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, pointing to various external PDF files. One of these links, 'https://traffmen.ru/aws?utm_term=exultet+sheet+music', is flagged as a known malicious redirector. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

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.
  • 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.
  • 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://traffmen.ru/aws?utm_term=exultet+sheet+music In PDF document text
    • https://sofifego.weebly.com/uploads/1/3/4/8/134899758/dumup.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/BicVib0/99691744958.pdfIn PDF document text
    • https://cdn.sqhk.co/poturofivat/GplBif2/20450318244.pdfIn PDF document text
    • http://redit.fun/395596855708e4qa.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/hbpGwcu/92222285767.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/limisapokane_kubigotasarosa_gefulu.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/heM9ERC/reversing_roe_netflix.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/b25f812e65.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/Xii35jm/bosoxuxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/jijekabadox/gLibhdY/55908918058.pdfIn PDF document text
    • https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/8931347.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/rxTHIjh/xbox_series_x_gamestop_pre_order.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/kajatobetegativabuf.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/eihyofi/duririwagezosawaxodon.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/gNif0xM/gisufinubezidozofuvoruwot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BE 4424 bytes
SHA-256: 730fc97fd336244f18132efb91f080f3f375a7f51c703f35a4812644b14d882f

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