Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b7785ee1d99320…

MALICIOUS

PDF

68.3 KB Created: 2021-09-27 00:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ce84966d6f8c43ef50263ca97e87878 SHA-1: ba224d4efb5b9cffae997299709047273f3ac01d SHA-256: 70b7785ee1d99320ea41bddcf3b10a41fc3ac980c8ca69ab4e54fd664a07a1ae
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. Heuristics indicate it's designed to trick users into visiting external URLs, likely for credential harvesting or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://hanyangsteel.com/files/fckeditor/file/214359411361505088a1486.pdf In PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/datuwinonuwak.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/67512339629.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/59583023505.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/10449239784.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/62548438726.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/fujitafididowitog.pdfIn PDF document text
    • http://chamdure.com/DATA/files/kowotejozukixoburebogix.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/femarilu.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/kowodakax.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/mazonuzugerudasi.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/zobig.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/91401417a34651692f625e3c728b9e90/26876223695.pdfIn PDF document text
    • http://cssh.es/img/file/98262768952.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/werasusekosizu.pdfIn PDF document text
    • http://abwessex.com/uploads/files/66236245012.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109060602226283.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210916041834.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/50913725137.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/xopotuxodire.pdfIn PDF document text
    • http://usmleworkout.com/files/file/xamogew.pdfIn PDF document text
    • https://manenshop.com/upload/files/kabijejavijazizanowomozol.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/ruwovaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=circle+the+correct+auxiliary+modal+verb+in+each+sentencePDF 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_off0000ade6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE6 11188 bytes
SHA-256: e1abd95f963d88a93d7ac12d9b8242419f82bdf211730a0df83e62d1434dd629
font_01_sfnt_off0000c7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F6 14060 bytes
SHA-256: a19b13a643a5ca4d37fd11da1d48cfc9f09e37e825c4e6504d6eedb3bb898a5f
font_02_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1