Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f0006013839070…

MALICIOUS

PDF

78.4 KB Created: 2021-04-04 19:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e9fdf2370f190df50ec3a324d46138 SHA-1: e256e09a7ae77c34199c1c06a61e33c33dffdf99 SHA-256: 59f00060138390708cc7141197751a170c2ded51a02e16b7008d47d61e5f400f
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm strategy. The presence of a 'Urgency / deadline lure' heuristic further suggests a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest malicious intent, likely to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/award?keyword=digital+filmmaker+magazine+pdf
    • https://cdn.sqhk.co/talulofofexa/jcdvjfV/star_wars_timeline_movies_and_shows.pdf
    • https://cdn.sqhk.co/nexetifosam/XJggHvu/vsco_lightroom_presets_2020.pdf
    • https://cdn.sqhk.co/wadupaxi/cGTjiSI/artillery_meaning_in_tamil.pdf
    • https://cdn.sqhk.co/nufesewepi/hcheEge/can_you_escape_tower_2_level_10.pdf
    • https://cdn.sqhk.co/gixedomawa/KiSgfYo/41628123629.pdf
    • https://cdn.sqhk.co/jidulopavoji/5dgcgjK/does_android_studio_require_dedicated_graphics_card.pdf
    • https://cdn.sqhk.co/zexupibo/cgegdij/5728133146.pdf
    • https://cdn.sqhk.co/pemoxeriko/q9ja5zg/4651442612.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nabasuxogakuwet.epizy.com/visudazoxuwoxanogudosi.pdf
    • http://wowijikozo.epizy.com/72461756174.pdf
    • https://s3.amazonaws.com/jixeremipet/zimixupamirelabomi.pdf
    • https://s3.amazonaws.com/xetasif/beamng_drive_gratis.pdf
    • https://s3.amazonaws.com/vetamedisoz/96430306162.pdf
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_a02b3ed43a7440f380240b4e255bf6b4.pdf?index=true
    • https://s3.amazonaws.com/bivanud/24926437917.pdf
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_686e71fb0409409f844515f32b6b77f5.pdf?index=true
    • https://s3.amazonaws.com/kudowo/lcd_16x2_lm016l_datasheet.pdf
    • http://juxenemijoguku.rf.gd/adm_pro_apk.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_off0000efa1.bin
51af895f14f4e5c96d917dc821a2572d2538553a32a48529367aefd1d1e365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 5296 bytes
font_01_sfnt_off000101a4.bin
52f9265153a8e1286f25ce43096e96c871c10fbeada63185a04c10a72a1c54f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 12172 bytes

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