Malicious PDF — malware analysis report

Static analysis result for SHA-256 a190ee000ea54078…

MALICIOUS

PDF

77.6 KB Created: 2021-01-13 02:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc8c14ed3770a18eacae3109e6d81526 SHA-1: 0f3b8d859f14d9693c68a2ba048b81913cd8ffdf SHA-256: a190ee000ea54078de63e49db0dcb450c241847ff0bac065cf647a60bdca7030
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://gettraff.ru/aws?utm_term=childhood+apraxia+of+speech+formal+assessment'. This URL is likely used to lure users to a phishing site or download further malicious content. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=childhood+apraxia+of+speech+formal+assessment In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fc249ed487f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388839/normal_5fc5ccbed7bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_5fb60f5494864.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/1816c613682ab57.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/2684591.pdfIn PDF document text
    • https://kekoluborefox.weebly.com/uploads/1/3/5/3/135327445/7989357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fb53a8ee4de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_5fb5dca583b05.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/tilom.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/feseni/vujivuxegufewizuri.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/3080326706.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_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 5368 bytes
SHA-256: 6877d7f42bb4b6474c999baf23440ad5a9cd2329e3d38c89dcae9cbb532813cd
font_01_sfnt_off0001043b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043B 10924 bytes
SHA-256: 72133bf7bca2659790a8b8fb19a102c345791443e44ce749b20595c7e8ff5778