Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e087fdc2c78e4c…

MALICIOUS

PDF

89.3 KB Created: 2021-07-22 08:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1208d79ebe05f6c31be62ec6291b6ec4 SHA-1: fd74a73f12e7d864635b0ae94657605e8d78283e SHA-256: 70e087fdc2c78e4ca953aba23570832cfb3b11a3a648038f69ed5e480d231ea6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://techscreening.com/userfiles/files/24881669093.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/fe718defdb242bda7a487434e44cf303/fewotefaxomofemotena.pdf
    • http://markone-tools.com/upload/files/xudarerusazenibugipabodo.pdf
    • https://ladangmimpi2.com/contents//files/babozodozagulurix.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/t72stb093ruiq7q71rm99h8cs0/89437956750.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4bb8733ff8ef95a810be3d078c5b12e8/21299435800.pdf
    • http://micronforgacsolo.hu/UserFiles/file/35286571741.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/8d5021db2a7f2603069430757c34b606/9123826741.pdf
    • https://begili.com/uploads/image/files/59885288387.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90b60aa28a---4840390692.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/bemqo9i32u005ei1id2jaknest/66902694912.pdf
    • https://cottonweb.net/userfiles/file/nulukoja.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1a3ad3e0ee1a184bc55f5b7af3765219/38985100716.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/049d5f47045ca8712fbca3e2ad74151f/jewus.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ea15f273cde92fcca605c9fd4faf5ddd/velegapelovopoxawos.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/94713413008.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/74666928813.pdf
    • http://naucseto.cz/storage/repujowe.pdf
    • http://kursadowicz.pl/Upload/file/pinabunasegi.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16080e969c1172---todezabulujibudu.pdf
    • http://tizianaiberti.it/userfiles/files/luluxo.pdf
    • https://mttrasportisrl.it/dati/upload/file/sosepotakera.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160843a4932b2e---tofakevasifijanalajenaka.pdf
    • https://xlspandoek.nl/userfiles/file/88632445987.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e333485e022---62407759570.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=holmes+cool+mist+tower+humidifier+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 16792 bytes
font_01_sfnt_off00010f0c.bin
c94ea9df5f163a509f485b77c35573c712ec23f23675c4082082de8d092b4787
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 17716 bytes
font_02_sfnt_off00013dce.bin
3ca497af9ba054ac5ecc61f4d8ad217e078be699f62e78cbadf4676a0db0bd97
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCE 10916 bytes