Malicious PDF — malware analysis report

Static analysis result for SHA-256 301b4d672031717b…

MALICIOUS

PDF

82.2 KB Created: 2021-10-12 06:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8c046e4cfee64adea8441f477b18f920 SHA-1: 175aadf49b0da1c30f53bea495288e76c06d09c7 SHA-256: 301b4d672031717b56f84c30eb0c86e2ab51e5a0709b8de86d6029aba2e6fa5d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and form a link farm, a common tactic for phishing and malware distribution. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a07ebe60b---36488300511.pdf In PDF document text
    • https://santeh.md/img/files/70303382305.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/lomanozuxoxujo.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/fitowunalizelubukalozud.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/72054327386.pdfIn PDF document text
    • https://bor-diing.com/upload/files/pitirunefez.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/bojasugenos.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/zozozi.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/nivalutukowulon.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/65628334777.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/xakivuvedepuwizepamixope.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/79420144202.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/4910977177.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/3204390529.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/66329280858.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/fonajod.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/remegulopimuferugatefe.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/88735766898.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/tuwofesewimo.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/59403074010.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/wuladafiwesafef.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/kiwobefufodajag.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/fufiwupomajebaratufiputi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/kirimofivoxoriwatewunib.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/sewanesivopozawine.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/2I9n2o-U8HI/uplcv?utm_term=past+simple+continuous+perfectPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94F 19092 bytes
SHA-256: 212500333bf75a0131b222377c28fcb4128f3ae53994b767f0cc351670cd1f38
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 10740 bytes
SHA-256: 4a396b4fc0985bc40e96f969ad81e23838752527a309ea328cd110759633df17

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