Malicious PDF — malware analysis report

Static analysis result for SHA-256 630ac56b74d09968…

MALICIOUS

PDF

74.6 KB Created: 2021-03-22 07:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1868d8eea712cefb4b64ce306ac38a31 SHA-1: f465adfef0c8533a7736f03b3bcab87fe310643e SHA-256: 630ac56b74d099682478fd087d89374b10b9cef5041c12db8c6e5dffb6dcec2a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly legitimate but ultimately untrustworthy domains. The presence of external URIs suggests an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/award?keyword=management+and+entrepreneurship+textbook+pdf PDF link annotation
    • http://zusiwibewire.mypressonline.com/which_of_the_following_statements_about_the_statement_of_cash_flows_is_correct.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/26785746270.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/jarmXgi/riwudunozog.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/ibgggfE/horizon_forbidden_west_gameplay_ps5.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/types_of_biomes_in_india.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/nc_youth_employment_certificate.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/gdJjaAW/mokimawe.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/reinforced_concrete_design_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/cidkifr/93943361830.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/fD5xejW/40276065123.pdfIn PDF document text
    • http://talemine.getenjoyment.net/68977584944.pdfIn PDF document text
    • https://cdn.sqhk.co/zipaduteki/hgfibUP/70538454146.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/kadofesekumepefipam.pdfIn PDF document text
    • http://nugowimabu.mywebcommunity.org/jonozojimazusanutinekulev.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/noxufewagif.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/87217807569.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/f6kjhIm/zoxatepiwopupen.pdfIn PDF document text
    • https://cdn.sqhk.co/nubowolimit/iohfDxt/solexurosufo.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/jigjGhc/90s_dance_music_groups.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwijiti.myartsonline.com/how_to_use_analog_timer_plug.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/40040928044.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/pewobegiberopelovikuw.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/befomuguze.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/english_to_arabic_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/42392359682.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_off0000e517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 5700 bytes
SHA-256: 0ff1e8bf47e75cfcf1f368f03eaadba6c071f653d9c19eee1c00f3799ea8d4b1
font_01_sfnt_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 10632 bytes
SHA-256: 5d6ac3ba592c86ec1f6ba0ef31335a1352ce2f629d34c056c73341693820f067

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