Malicious PDF — malware analysis report

Static analysis result for SHA-256 69db0848bdbb60c2…

MALICIOUS

PDF

92.6 KB Created: 2021-08-14 08:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cab30a4b63bd8b53c803fabed243aa88 SHA-1: 853ef8fcfc1b93288dbe0aa992fee9c5ec39d125 SHA-256: 69db0848bdbb60c287d439005544d5c88e42f733a17c5d03a7a9d798f6691255
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://animalscipublisher.com/files/upfiles/file/bowatojajelap.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160839ad04768a---68761422731.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/163236f375d2247dff9d618fbfb21054/8276601505.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/memapatusexujewoporevoxe.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/67ee4e406caf12735f0d87524dbcf9b2/12710842138.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609736ea4a48f---ginuwimedonuwebin.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/58661957973.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/xuxokopusubakil.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b2d7e4bb03a516f17c45d8c699d6a5b6/52440189297.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/xovesupevasa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3570d9332---panagexiduvi.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d810b0d5ea3163dcd067d6eacb3473c4/fifobano.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a087832e695---virosuzuririjire.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/83973749779.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210520100834_830458856.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/denemasa.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/70020517056.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c828f340---jesonebamipobena.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/32874636437.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/90718893383.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/86462514648.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/83fe40248b30fd94f47934e02222f9ca/nixaxokolobuwevaga.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a0204f2ff658bf89040f2a50c2ea0420/bobozamozeledavalirozup.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/51988186171.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d750e4e3901---nuxupejobakepire.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3caeec194e---51344524079.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/rh7cjahh4kv3ee459cc57ejqp6/74542338297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=garlic+mashed+potatoes+recipe+instant+potPDF 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_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 17280 bytes
SHA-256: b1929fc1c62ef1ada0e340d189e8dd11b073df53582056f9ad3c1600e468569c
font_02_sfnt_off00014b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B29 10816 bytes
SHA-256: b49c9dc43b42b776c2c76cc917d30550153118ee621f72339e8364196e725d01