Malicious PDF — malware analysis report

Static analysis result for SHA-256 a812195a97acaeb0…

MALICIOUS

PDF

86.6 KB Created: 2021-09-15 10:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 11d89fead761d92cb35905c49f4814a1 SHA-1: c2837c17010eda5ab16b25a712c30872f93fe451 SHA-256: a812195a97acaeb006ae8fb25b62ca570661ec6203c13f9fdf161d7973b04e7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a link farm pointing to multiple disposable domains, likely intended to redirect users to malicious or phishing websites. The PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=best+pokemon+game+for+iphone PDF link annotation
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81881063356.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109100546239543.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/wodexemirabawakege.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/79682312504.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/tilavaxetabironelezafeme.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/fovugejavan.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/kimunekadidatusomaxaxif.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/14222465090.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/23040503181.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/5898777726.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/37142905495.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/16054134059.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/givegeva.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/disoguke.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d93ae2187e---burinaxekumepipizuv.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/kesolejedamona.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/rinabemixudijikanisorog.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/zadamivasovugazepegulopig.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/39df2ace195190a3befd474fd4d319d9/miduv.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/68988088247.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378c5bedefc---beleziximemaxupibu.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/34121455578.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/wogewalurolof.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1630786284.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://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_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 10904 bytes
SHA-256: e9781581bd2d282586328ea5da056e3b003b5544f9ab04dc97f512399ab19653
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 18712 bytes
SHA-256: bdc71a12cddb9e2129117c6777381c7ff74b3a704a58dd5928426ade0ac00dd7
font_02_sfnt_off0001343a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1