Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee51f2591be1e7f…

MALICIOUS

PDF

66.2 KB Created: 2020-11-24 14:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 92753d9ef4bdce0b44a10078f737b846 SHA-1: 56c355b86e3e5251f65b85abf325565c7f6c7a7f SHA-256: eee51f2591be1e7fce68fbcc7540a6905b4e84ae6e02b715487fa82b57115b0c
162 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 'traffking.ru'. This URL is associated with a lure for downloading 'adobe reader 10 full version', likely a pretext for delivering malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL and the lure suggest a phishing attempt to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=adobe+reader+10+full+version In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5f8dec185cef2.pdfIn PDF document text
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/gemizal.pdfIn PDF document text
    • https://xaranetudu.weebly.com/uploads/1/3/4/0/134016810/sesolo.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/2c370637a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fb8f8ae13691.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/wusigipufuvowix/charter_schools_idaho_falls_id.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/56656684922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b75056-d4f9-4dbc-841b-39c07785fdde/west_coast_shaving_coupon_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c53a99-dffc-44cc-b5c4-a7d579f22fc3/alcohol_functional_group_name.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/70093689700.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_off0000c5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B2 5284 bytes
SHA-256: 6c9863f3fef7c632c1a53ef35aef81185cb83b5832a587ccf7c4322712326faa
font_01_sfnt_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 10672 bytes
SHA-256: 611d0c640ce99904cc8aaef6906535009500b9b64460212ff7dc7983c10f7ac1

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