Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a912b85062100a0…

MALICIOUS

PDF

75.9 KB Created: 2021-01-19 00:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 70c35bb375e0b8aae29e026ffa372013 SHA-1: 78c5245e721a7a5c5cc5a69b973aa780c362f1a9 SHA-256: 0a912b85062100a01eb7c094d537f7c02beec2985c172bec1bd561a5863865f0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure and a large number of embedded links to external PDFs, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to potentially harmful external content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://cctraff.ru/123?utm_term=polaroid+spectra+system+camera+film In PDF document text
    • https://cdn.sqhk.co/dikabopagesi/tl1Dijw/jaime_lannister_armor_buy.pdfIn PDF document text
    • https://ganalazukomej.weebly.com/uploads/1/3/4/7/134714395/kavediduga-kikarojururuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/pibigovaxavu/6ybYdij/prison_break_season_5_episode_1_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/dMhihhe/cute_funny_sms_ringtone_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_5fc310155ae07.pdfIn PDF document text
    • https://cdn.sqhk.co/godanalumado/cHIidhh/zombie_diary_3_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_5ff0e1bba8bc0.pdfIn PDF document text
    • https://cdn.sqhk.co/zelagagunogo/pxgdhjj/78717870152.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/cgfhgif/draw_me_out_game.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/27db7bd022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_6005d07e600b9.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/tawimemoz_vaweven.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/o7hfhOb/92618985386.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/aVgiAgd/merchant_of_venice_quotes_and_techniques.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fef5a4c9a241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5fe31b89be9aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fee99b59abbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5fa06c40417fa.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
    • 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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 5084 bytes
SHA-256: 8c76f7878964ce06bba183074342c05eae73acdc805da7dbb0256814ff34b162
font_01_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10868 bytes
SHA-256: 5f35dbb29aa153db766bb91eae7404cf19c5ed01798fa60376ce07aabefc5c4d
font_02_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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