Malicious PDF — malware analysis report

Static analysis result for SHA-256 b784bd2b79eab8ea…

MALICIOUS

PDF

88.5 KB Created: 2021-04-18 11:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ea6ea1268af1497e2ace86ad32d46207 SHA-1: ce807ee5f1af78f92769a741afe996c6a60ab1cb SHA-256: b784bd2b79eab8eae0f023ab109c303daa96c733349fe78d43b6b8fcc7bd351d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains multiple embedded URLs and exhibits characteristics of a phishing lure, as indicated by the 'SE_ENABLE_LURE' heuristic and the ML classifier's high confidence score. The presence of external URIs and a link farm on disposable hosting suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the document's structure and heuristics point towards a malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://soxebez.ru/strik?utm_term=como+hacer+una+hoja+de+vida+en+word+paso+a+paso PDF link annotation
    • https://cdn.sqhk.co/sipobufiw/oV4nNtz/70834103041.pdfIn PDF document text
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/9644987.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/seventh_day_adventist_bible_commentary_vol_5.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/jb3ihiZ/34458828342.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/pGgfFib/craigslist_phoenix_rvs_for_sale_by_dealer.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/jogoxa-bupupeki-xosotumadoj-fabuganekurofi.pdfIn PDF document text
    • https://xovadesunuzavam.weebly.com/uploads/1/3/4/4/134479636/varodu-saruzijaj-fozefozome-kukadopinejin.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/33532015626.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/gI73gie/amino_beyblade_burst.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/34761984606.pdfIn PDF document text
    • http://beremoter.online/84639516441i2697.pdfIn PDF document text
    • http://getplafond.xyz/sexevekipemubaua95j.pdfIn PDF document text
    • http://punejew.mygamesonline.org/how_to_make_extra_money_on_the_side_from_home.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/iiBIii9/train_sim_world_2_deluxe_edition_xbox_one.pdfIn PDF document text
    • http://polypak.site/what_is_the_order_of_the_books_diary_of_a_wimpy_kidxiyj9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://murapimopavopa.myartsonline.com/neromosetoduworuloj.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/taniguxatoki.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/58266917715.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/56274129117.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/41543193751.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/no_game_no_life_light_novel_download_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/vubuzunafinijevonarijewop.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 5332 bytes
SHA-256: 76cbc3d2a434224a7204f5c828adf92c4962f0b765c646dd9aedf6e7fee4a1b6
font_01_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 13360 bytes
SHA-256: 5131635bd662b123a9537d1c1f5db428176912c8aa333343166617d084e49d09
font_02_sfnt_off00012f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F20 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61
font_03_sfnt_off0001441c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f