Malicious PDF — malware analysis report

Static analysis result for SHA-256 82182c853ff50e65…

MALICIOUS

PDF

69.8 KB Created: 2021-09-24 14:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: f7176e0ea2e3ec4b8e5eb7a915c7a179 SHA-1: 04f6f5d75a1ac49bbeaacfe4814f53a8186c28dc SHA-256: 82182c853ff50e651cd6f466d2dc52e8b674af4e40bb4276137aad2102165186
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable or compromised domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://kme-kme.cz/files/file/179644934.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8b6090d0e0e7884caa658fc40f4cefe4/sukoxagugivusun.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/63384182943.pdfIn PDF document text
    • http://akgdsgfly.pretty-match.com/upload/files/4378113460.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/42801570814.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/57713714677.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/kotoxufisipiluwexadefegiv.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/24074159698.pdfIn PDF document text
    • http://camonetinternational.com/files/file/vitupijizowute.pdfIn PDF document text
    • https://servicepapik.ro/files/89744783639.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161395ba5b4692---kinakafibu.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210912172059_bpfhvn.pdfIn PDF document text
    • http://esejsc.com/upload/files/semevupudusoje.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/rarovivoxademozajafudab.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/86654356801.pdfIn PDF document text
    • http://bastola.org/userfiles/file/63340146474.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/tisadoziwosesodefu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c84c952e8---xepisowivikem.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/jovipelur.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/75305582991.pdfIn PDF document text
    • http://land89.com/ckupload/files/weminibepo.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/34316198903.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/67951260042.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f34744e555---40118244446.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/76602984425.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/45063531898.pdfIn PDF document text
    • https://olterus.net/contents/files/gojoxukegesurimomogulad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=rpg+with+character+creation+androidPDF 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_off0000b2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E9 10712 bytes
SHA-256: 0d0af7fe66dfceacb5d15f9a03ae5520b25c5ad2a2db239bb74834149cb56842
font_01_sfnt_off0000cb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB52 15032 bytes
SHA-256: 3b63edd9478987e3ba38de227a9d27c3d4232f10a9747d6a53c6cc043b0339bb
font_02_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1