Malicious PDF — malware analysis report

Static analysis result for SHA-256 782d671713e3087d…

MALICIOUS

PDF

122.7 KB Created: 2021-07-27 08:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 85f62b6e0d98c5d0ee1a8f4ce271baf2 SHA-1: b6d053127c67b42f7dc4893dcb68ecd13b4bbac3 SHA-256: 782d671713e3087d68079523ec30059cb02bab8e59cf0b595c808d9746f84932
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://beateromer.com/bilder/file/92750069042.pdf In PDF document text
    • http://wisdomtours.net/upload/file/jawatavixurodenajini.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/14492521737.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/70246783835.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c1cac816cbaeb6ddbdc5e5321b860164/zamufaluxipego.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/geboxilesoj.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/70954928781.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/p1bfkjr6qs4143l7rv0lsma965/nibeluxevofurorazukobokok.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/9tl42nlv8i8e46rhg8vo94pa33/57994007688.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/von4phd37i39cp00giaijcpo4h/ramokid.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/mixoju.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/gowovigiwigegijonekukibaz.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/73543158096.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/afebd21119ab84afb5ce1afc18893b04/lijajazixux.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/66027409811.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7cabc472a---65243986461.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5f5621b81253bd449816ca32b15768bd/sojekeri.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/85977920004.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/224accfdcb8ff8804533026588e83af5/86550823713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+the+difference+between+guided+media+and+unguided+mediaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014ad4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14AD4 20872 bytes
SHA-256: 5226e19ba1a29685d1ac678ead30395d8b6776931b8dec3b03b2c7a1435bbb5b
font_01_sfnt_off00017017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001882e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1882E 11076 bytes
SHA-256: 8b19b68ff8cd99a65b48add77244a9281d1bcfa4872902d0ec4b489065128db6
font_03_sfnt_off0001a1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1A5 23660 bytes
SHA-256: f462b3f459f30c88a6df59fe8bffd1cccd7f393350f654f6568aef993d14c1d9

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