Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab327fc97db6450…

MALICIOUS

PDF

78.8 KB Created: 2021-03-02 22:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 02af92ae001b908343eb83993286f7f1 SHA-1: c80be72bd4a265ac5f7ac03ad82ef88191848a98 SHA-256: 5ab327fc97db6450ae3f3d5792aa1d520ec47a8f6a930a40f7f0e2d8b72a3cf2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external URLs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/wix?keyword=drawing+circuit+diagrams+worksheet PDF link annotation
    • http://zakosemej.mypressonline.com/what_causes_hot_spots_on_your_scalp.pdfIn PDF document text
    • http://lesantyqas.online/inspired_education_inc_answers705sh.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/gibc2ib/22152332102.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/lg_front_load_steam_washer_and_dryer_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/fijgewE/super_glitch_dash_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/hfhcjeu/image_editor_for_pc_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/giKSgf1/offline_poker_games_free.pdfIn PDF document text
    • http://hookup154.online/insinkerator_garbage_disposal_septic_assist0q7qt.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/dhejgib/3d_photo_album_video_maker_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/eAS3Liu/buena_vista_golf_course_ventura.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/starbucks_cold_cups.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/ibUjchK/pazilekubikulerujakirifig.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/ghjjgcw/18857159380.pdfIn PDF document text
    • http://iglivesupportteam.com/nasonuido7w.pdfIn PDF document text
    • https://juxosejuw.weebly.com/uploads/1/3/4/4/134481686/6604426.pdfIn PDF document text
    • http://inmyshtangen.xyz/81904697374pczrp.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://zevesijuduma.atwebpages.com/96375485916.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_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 5356 bytes
SHA-256: 3ffee1e99a33c829ac9b27a824362a08cebb4e58a2e952c09489b21872bfc72e
font_01_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 10148 bytes
SHA-256: f896487812129d01c62ce45e1ed073902229dfedc1ce10f7bd6294601b2c851d
font_02_sfnt_off00012007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12007 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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