Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c57865668d195b…

MALICIOUS

PDF

72.0 KB Created: 2021-01-18 09:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1a47d8747a3b47fe7238b388bbcac009 SHA-1: 3596df9fb4b7774f6bd5239a719419d17fe27906 SHA-256: 44c57865668d195bdd8f2173d70a6c4a6a2db5a7d60bc4da44ecb43c11af3fe9
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to disposable domains and employing UTM parameters, which is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful 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://trafffi.ru/123?utm_term=www+orkot+com+br PDF link annotation
    • https://cdn.sqhk.co/rapowipijes/7ws2b3U/instant_pot_spinach_artichoke_dip_no_mayo.pdfIn PDF document text
    • https://site-1247032.mozfiles.com/files/1247032/rafizigipazewutigufuraw.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/hbWtjdH/portland_winterhawks_roster_age.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/3jchgjT/modern_age_president_simulator_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/hLhei9o/fox_theatres_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/icHgjhh/65317002676.pdfIn PDF document text
    • https://site-1177349.mozfiles.com/files/1177349/star_wars_galaxy_of_heroes_forum_player_id.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/YPK7Cib/13202423200.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/buKSHid/carrot_fantasy_jungle_12.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/egigjWU/hcareers_washington_dc.pdfIn PDF document text
    • https://cdn.sqhk.co/wovegase/jififUM/woodturning_3d_wood_carving.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/durexelunoguzenitipezobuw.pdfIn PDF document text
    • https://site-1168140.mozfiles.com/files/1168140/vofibi.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/ganubifirigevi/types_of_cells_in_the_body.pdfIn PDF document text
    • http://tinosizifaxuful.epizy.com/renaissance_periodization_diet_template_free.pdfIn PDF document text
    • http://godemesefiw.epizy.com/20200348615.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/jajuzapavegumoni.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kowewubinibitibu.pdfIn PDF document text
    • http://fesenobonirizu.epizy.com/todilazob.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/6895264644.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/library_borrower_s_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/xatexojotububonogo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/mr_nicks_sub_shop.pdfIn PDF document text
    • http://xokutamewa.rf.gd/hell_warders_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 4836 bytes
SHA-256: a03dc97431137bbe24ee7b762ef27c8cda936db8a06ea00a4dc9a4bde1e94c16
font_01_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 10936 bytes
SHA-256: cdc5c436050e8d18c9e3cd6bc1b3e7d0e58fdad83cfdf246f36aff467ad2b70a

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