Malicious PDF — malware analysis report

Static analysis result for SHA-256 0270a0894a4e2371…

MALICIOUS

PDF

75.7 KB Created: 2021-01-01 21:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9330618b5cde7b70e2e4cf2607d8caa8 SHA-1: 65699b05989c1628880c1207657d4f6024241cce SHA-256: 0270a0894a4e237131a5ce0db137eed1f7edcb713f72872033cdf98e68399915
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://trafftec.ru/strik?utm_term=carrom+board+game+online+play+4j', is directly embedded and suggests a lure related to online games. ClamAV detection and ML classification further indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and embedded links point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=carrom+board+game+online+play+4j PDF link annotation
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/b01fa79.pdfIn PDF document text
    • https://cdn.sqhk.co/zojisixu/SheRhbJ/suvazawojegodupog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jodabiladezot/86004391199.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/boney_m_christmas_songs_lyrics_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e582115f-dd29-4167-b255-567c2b81c64e/75257497374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8225a10e-d7a6-4ea1-990e-e171d11ff899/nenewarotuzoxuxemase.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/extended_weather_report_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20936fbe-dee4-4591-82aa-311fe93d8740/80264766230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6e56ac-bb2a-4562-9852-dd6b8cd1e83a/adjectives_to_describe_a_blossom_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5dbd74a-95c9-4ed8-8c0d-a58f82e7a46d/the_room_original_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96dda6d-46eb-4280-af5f-739ec4992d5d/vowixuzuzud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 5240 bytes
SHA-256: 3a9e061ebc0d90f6002ec37ef9067795b170fdcc35b128498538e519d40d27fa
font_01_sfnt_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 10624 bytes
SHA-256: 876d4b9c96cabedcf0d0c1c7be92ab2caec72b875ed23124903998a635b2e191
font_02_sfnt_off000113be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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