Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b866ee26128aa8…

MALICIOUS

PDF

73.7 KB Created: 2021-05-01 20:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c933b41e792c48206410a2d49e03ba1d SHA-1: 5c814e05db50d3703e05b74aab841bd61a8b9d51 SHA-256: e7b866ee26128aa890fa4081b61f432964c44e57e189fcd15e809414adbee2cd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to reference search terms like 'Autocad mep 2019 manual pdf', indicating a lure to attract clicks. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/strik?utm_term=autocad+mep+2019+manual+pdf PDF link annotation
    • http://medyahanem.com/5729953383tlq3w.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/irFhcgf/givibotevafabivavixamel.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/hjLwJgd/fepaxavedajipetobebogo.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/cnifyhd/breadwinner_synonyms_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jiJIgge/marketing_definition_core_values.pdfIn PDF document text
    • http://zdsshop.top/923033382207k5ni.pdfIn PDF document text
    • https://cdn.sqhk.co/sapidefapo/mVBigii/12121541781.pdfIn PDF document text
    • http://ita-talia.fun/neverending_story_cast_names9a6lm.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/jhpjgGR/water_sort_puzzle_online.pdfIn PDF document text
    • https://cdn.sqhk.co/diruzatojep/pohatrv/singer_johnny_nash_wife.pdfIn PDF document text
    • http://idealica-ufficiale.site/dekazigowujezabam6itq.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/ihJifjg/81309574812.pdfIn PDF document text
    • http://lnstagramcentre.net/lekepafcbga.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/aihiLif/train_simulator_free_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/how_to_program_my_spectrum_remote_to_my_onn_tv.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_fe10b510f47048a4835c8257db856630.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zasepo/daxizewoxiri.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_694e189cc1234cafbf544a7a3429f729.pdf?index=trueIn 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_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 5496 bytes
SHA-256: 51ed5adb42f607585cf3faf4dad2bbbcc15fa54953d16c0fc20c19ba7068775e
font_01_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 11396 bytes
SHA-256: d79c2a91d3c71344bf1165bfcd07ba47001ed6fe01478bab4be462dd85c54f4b

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