Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c493e51585da6d…

MALICIOUS

PDF

66.4 KB Created: 2020-12-21 04:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1c86c7840d79c3bd1562437cac6879f2 SHA-1: 9917f36bc46117e54ff300394a4afbc7084d5462 SHA-256: 35c493e51585da6d809daa1a538e2ab390cd785e5235690e0e441d30a5a9e784
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to 'one punch man iphone 8 plus wallpaper', suggesting a social engineering tactic to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/strik?utm_term=one+punch+man+iphone+8+plus+wallpaper PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379855/normal_5fd06baddd3ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5fca969f81aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fd64da674ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_5fb76bccd4c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87b7ab87fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5fdae1289dea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5fa8c84998e59.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/ec761403b2dc.pdfIn PDF document text
    • https://fifeguku.weebly.com/uploads/1/3/4/7/134733895/xiwimoxesi_wudewelowub_dudezokojaxifa_falotom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f47120-a76d-4388-9094-76bd7504a757/how_to_draw_anime_step_by_step_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89310b13-d81d-490f-9494-c9bcd3d9c428/vunogup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626e75b9-9f88-4a48-902b-e5f5b6606dc2/torerofubifova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78679f5f-aada-4d5a-9442-a50ba4506b1c/seduvitefezuwegivoleji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8dc039-65b9-4c5e-9147-a6050d0521e1/lawewizutapobepo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcc9390302e2a48c50846/t/5fdfeeb70f6c913d441478ae/1608511160343/50719808482.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9dc92e354156ad6af401/t/5fd75b810f11661d4c49d4c5/1607949186254/bahubali_2_720p_worldfree4u.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_off0000c38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 5488 bytes
SHA-256: f525f858a35e42cf1b6f5cac50497b74d871a4bb8ab5463b0f822a08f14b1190
font_01_sfnt_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 11884 bytes
SHA-256: 749668f7e82739ad71b4e0aefd1def7754132905c9072b6730b9d0a14d5e9765

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