Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc5ab0d52eeda0b…

MALICIOUS

PDF

76.4 KB Created: 2021-07-01 18:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d37ecd70084fc1fe464fd46c0ee0e7d6 SHA-1: bf19f86d939e9b19342a4f16600f0fae1ed949a5 SHA-256: bfc5ab0d52eeda0b10d9c236b1ee079f017f041dd3c62a4f47b685771080cb27
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, do not contain exploitable content themselves but serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/1f980c4d1ecc563873abe2e98caef4d1/mabitofogogezivirededeji.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac47a53479---44214482298.pdf
    • http://fittbikese.hu/files/file/rikozegexopawijejotax.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad57bdc793---43747763786.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/9014fad0f5bdd4f714dfea7bebb0043a/fetezuxidunumuxopu.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d3de26ad4454fdded86ecb39e41bc2cb/98855106781.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910a84befb0---93312179245.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/mj2hrd47oc4u8jt5e3a6fl3rrq/jisuka.pdf
    • http://mbcasc.net/imgs/file/jutuwusafemed.pdf
    • http://osmed.cz/app/webroot/files/files/83784959876.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/gj5hu3o689r9sjj27913ddvcl2/jexuzuna.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce69d8dbd---xizepojijisolebuvaxaji.pdf
    • http://wwstationery.com/files/file/vivopejul.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fffa5863b1---pebanakarujurowexi.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa45e171a3---56061168727.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/3jucmvo7m5t0ddgubormgolj21/34291547692.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/uof43d8a05gogfkhu1tsbm0j30/fekivu.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab726cde448---bovosimob.pdf
    • http://golden-candies.ru/webroot/files/files/lilejedevar.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/divosowavimaba.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/72757738383.pdf
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/pevifilejatap.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/9a13c29bc65c076ccaa9076ec37ef38c/fujumipez.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e8b401fa9c37f3b6beedc290624a77c7/61175200654.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=to+put+things+in+perspective+synonym
    • 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_off0000c690.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC690 16792 bytes
font_01_sfnt_off0000dea2.bin
b8bf659fb27506be7d09bff869b16558e68e6ab7b691fe9bb81430eb3facc0ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 16560 bytes
font_02_sfnt_off00010974.bin
cc77f64ab3f33ff0cdfdbf023ba336348b6af975bd688df32521f607eb153855
pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 10856 bytes