Malicious PDF — malware analysis report

Static analysis result for SHA-256 12feffa79bc3145b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 05:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb9692c1fd800583a569c5c849b6662 SHA-1: 2cd0c355dbc07b55565324210f45a10e0e0c5d8c SHA-256: 12feffa79bc3145b899ee49d1d6a81aa29c3bc71b7b5bacd1620d2a4e08cbb38
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or distribution point for malicious content. The document body, though heavily obfuscated, indicates a lure related to a "Picasa 3 manual pdf", likely to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://jacksth.ru/wix?keyword=picasa+3+manual+pdf
    • http://iclod.tech/busy_accounting_software_learnf8ob3.pdf
    • https://cdn.sqhk.co/pigevikuwi/jihheoV/new_york_city_hall_guided_tours.pdf
    • https://cdn-cms.f-static.net/uploads/4392463/normal_604aeb6ab1ae7.pdf
    • https://gusefokujugox.weebly.com/uploads/1/3/4/0/134040973/jerekotarudokuraxigo.pdf
    • https://cdn.sqhk.co/gafisasiwu/yiggh8X/knowledge_is_power_meme.pdf
    • https://cdn.sqhk.co/vuzowadijavu/iieNhe4/fall_secret_menu_starbucks_2019.pdf
    • http://aicberg.net/881305764548kdp0.pdf
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5ffca35714ec3.pdf
    • https://static.s123-cdn-static.com/uploads/4384471/normal_60069047bb7a7.pdf
    • https://cdn.sqhk.co/pododefakes/ifuiiha/wedding_certificate_template_uk.pdf
    • http://moscow-siberian-force.online/58400288111jtbtv.pdf
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/tozukamojaz_morupapeda_lumefugidoroma.pdf
    • https://cdn-cms.f-static.net/uploads/4406169/normal_6041597dccdc4.pdf
    • https://cdn.sqhk.co/livefivepa/jgjdgdh/craigslist_ny_state.pdf
    • http://mosdendy.store/buwisajudevijotawekizop23c7c.pdf
    • http://my-credit.info/altered_carbon_season_1_episode_6_redditu88lh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xoxaneral/stepped_foundation.pdf
    • https://uploads.strikinglycdn.com/files/6585b824-86e5-4933-9532-8e3789356335/51600666317.pdf
    • https://s3.amazonaws.com/bejenosugede/potelaxagezano.pdf
    • https://s3.amazonaws.com/lusegokaves/27114956415.pdf
    • https://s3.amazonaws.com/vudivuzakal/37059186919.pdf
    • https://uploads.strikinglycdn.com/files/25440a10-d9e8-4e94-8348-994807e448da/naming_acids_worksheet_chemistry_if8766.pdf
    • https://uploads.strikinglycdn.com/files/1ff5155c-f12e-4161-9469-126266c4f420/irrational_numbers_math_proof_definition.pdf
    • https://s3.amazonaws.com/lijopavexanuse/kiwoxipakunasuzijukow.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_off0000ed09.bin
85f293aeb2c0955eb26f479b2a9e259f03a60ca2af9ccaa823a6d75076f6cf2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 5368 bytes
font_01_sfnt_off0000ff40.bin
51c97fbd265ce15d6ff378c9c0a9826596d7b93025103267c46246d466798dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 12328 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.