Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a73163906700d3d…

MALICIOUS

PDF

74.2 KB Created: 2021-01-14 12:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e62daf2fb239081852220da3f26bfb36 SHA-1: 7b626b94b4f1a688723fd78d1f895c1e61a81c72 SHA-256: 2a73163906700d3da81efb3f61c222e249f4e9f9d381f3e0dd62f164c4ff3219
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'traffine.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of a malicious redirector suggests the document is designed to lure users to a compromised site, likely for phishing or to download further malware.

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://traffine.ru/aws?utm_term=feelings+words+worksheet In PDF document text
    • https://site-1176664.mozfiles.com/files/1176664/catching_basketballs_free_basketball_games.pdfIn PDF document text
    • https://site-1168447.mozfiles.com/files/1168447/bugs_bunny_and_lola_costume.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/118591190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5f9cc4a6398c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fb60259d6485.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/zakewisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fc3402bdc756.pdfIn PDF document text
    • https://site-1194807.mozfiles.com/files/1194807/touch_n_go_app_top_up_card.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/dakebesuvum/game_dev_tycoon_guide_colonization.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/58140236889.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/17848429813.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/cambridge_dictionary_app_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/elle_greenaway_criminal_minds.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_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 4988 bytes
SHA-256: 35b50740bb2d3cf87e0a31a110226aae287dbeaf7b4eb65789a95aaa1048e3dd
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10360 bytes
SHA-256: 828c5cdf3a196d97a1303389e5568eaf8796a1996833ceb390c10c6e35cf5bd2

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