Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbea14adec93295…

MALICIOUS

PDF

72.2 KB Created: 2021-01-05 04:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dfd8802685e616752f54e41c0194407d SHA-1: 77d58687e942d9bc52fa3b894a9c67d206629c2b SHA-256: 7bbea14adec93295d1fd7da6621f642306807ee46a0fb084f5d291c84c4db97f
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://traffine.ru/aws?utm_term=petra+travel+guide'. This indicates an attempt to lure the user to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://traffine.ru/aws?utm_term=petra+travel+guide In PDF document text
    • https://cdn.sqhk.co/vuramufef/jfgcii6/t_mobile_prepaid_refill_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5fc2d4cec5224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5fbb1517acccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5fc76506e0195.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/mubemutolewe/taboranazukufedetalupewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b39251-4012-46d1-82ac-6145b8f263a2/one_hour_that_changed_the_world_documentary.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/zozizurow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4e42c2-8903-43da-9df8-987d30ba7e56/zofetazikab.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/functional_skills_reforms_city_and_guilds.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_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 4876 bytes
SHA-256: ef959f740110e6d49c8856e442ab4b1faca4359aec4d63dcec368d7a0587cfe1
font_01_sfnt_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 10920 bytes
SHA-256: b1305319fab361491b79d0f38311964a174e23331ec553ebbd8e5ec08d72f617

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