Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddd7a6de5ec84ff…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 23:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a8f569e6e49e942071fa525983f27e SHA-1: 92699bb0005176c7a61376d809d7e0a2c749ee9d SHA-256: 1ddd7a6de5ec84ffea5c8b1605c51a382a3bee3372ba6fe3959d98caf910af30
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary external URI points to 'https://mezovuduw.ru/award?keyword=avinash+kaushik+analitica+web+2.+0+pdf', suggesting a phishing or SEO spamming attempt. ClamAV also detected this as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/award?keyword=avinash+kaushik+analitica+web+2.+0+pdf
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/d8422ec8147069.pdf
    • https://dikubudekoguzo.weebly.com/uploads/1/3/1/8/131857294/zolagagorijesevomope.pdf
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/59095984a5.pdf
    • http://betmoy57.com/kings_league_odyssey_guide9ja7r.pdf
    • http://tideboweped.medianewsonline.com/24008774438.pdf
    • https://maraduwiz.weebly.com/uploads/1/3/4/3/134363873/c3d11.pdf
    • http://thelandofbadideas.com/gazizizeneduvee3ht2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lulelepese/7336134859.pdf
    • https://uploads.strikinglycdn.com/files/82cd02ed-f912-4bd9-879c-1263d6d1ae49/fundamentals_of_youth_wrestling.pdf
    • https://uploads.strikinglycdn.com/files/b9c0e0ec-d652-4e25-b54f-b688de03507c/85318754530.pdf
    • https://s3.amazonaws.com/fowikorejodi/23697518888.pdf
    • https://s3.amazonaws.com/gekixadonuru/zadegimororepij.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/gutaperuxeza.pdf
    • https://uploads.strikinglycdn.com/files/e3a7c656-23c2-4743-9d14-3eac1ef48bc5/how_to_find_options_on_thinkorswim.pdf
    • http://xevijojikutep.onlinewebshop.net/75761621219.pdf
    • https://s3.amazonaws.com/mujesogi/que_simboliza_el_arcoiris_en_la_biblia.pdf
    • https://uploads.strikinglycdn.com/files/4d9de736-cebf-495a-9aec-d5a5157876d7/crossfit_workouts_at_home_with_weights.pdf
    • http://tirisesu.onlinewebshop.net/20327401456.pdf
    • https://uploads.strikinglycdn.com/files/8e9f6499-4719-48a5-bcfd-3ccbe51a16b7/zoraji.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3c.bin
75f5939d6f789a72b1ace70d972800c218827ea02355fd3052c2605638fa05d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5796 bytes
font_01_sfnt_off0000ff17.bin
4afc4f1037b9c4babb3103633f8e533aecf27888bb75a010057f6593a21c6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 12716 bytes

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