Malicious PDF — malware analysis report

Static analysis result for SHA-256 37eaee9a2aad17dc…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 17:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60874e3919b62af264120c0831d8c7ca SHA-1: 91df2b66dc983070674e798917f8ef91925121ad SHA-256: 37eaee9a2aad17dc1e869006e02b30b4d35fca5f7c81fa1edd276d521207cecc
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/award?keyword=beaglebone+black+projects+pdf PDF link annotation
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/7998824.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/zetikore.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/8fc8a2cc73.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/dasometofusu.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/61fee7.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/hbjaxs2/pivot_color_war_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/fggycii/street_racing_hd_game_download.pdfIn PDF document text
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/c6498b9fb0a.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/fgghiij/cars_for_sale_near_me_under_1000._00.pdfIn PDF document text
    • https://siwufofewexiv.weebly.com/uploads/1/3/5/3/135329456/genobirizejexo.pdfIn PDF document text
    • https://sezavifibeka.weebly.com/uploads/1/3/4/4/134463458/a92fe5c1e41f59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_72950ca848cd4da9886d521f7d57c7db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a9b2ac-0a4e-4db5-b1cb-907c4aa39aac/prince_lionheart_white_premium_wipes_warmer_instructions.pdfIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_f3dc8122657f4f4f9bf3181b838ac07e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f5ae5c-eb16-491d-a940-45d2bdc0fba3/41605592598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07c1c53-f0ed-40ca-aa95-a3e8d1bc4fb8/ladepuvizapunoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5072596c-6c44-4335-a4de-c10ee7959636/rheem_rcba_3765gg17_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc723bc3-6e15-4974-999f-d8da4fbdf80b/mrs_funnybones_book_author_name.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_9ffa5bb951b448b99015b9cc9c8d2c0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea03db9-2865-4a3c-b2a4-278d3b453b3d/4198873963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53306675-548d-44fb-b714-2cfe5e7444e0/20252513903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384698c0-a212-4d95-86ea-bb12b28de155/behringer_xenyx_q502usb_premium_5-input_2-bus_analog_mixer.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_7083bde14dba4ea78bff5175a5ce08dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7080ab-038b-42d2-8037-054cc5cbf0f0/metaphor_in_the_giver.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 5652 bytes
SHA-256: 2f16119ddb7d0fba3083385daf696a2256098df2dff37dc66e9bd9415c5ef3ca
font_01_sfnt_off00010dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC2 10668 bytes
SHA-256: add027f2b7126ad506d74b2eaf930ff0157525fcfe69531382fd1b41499cc2aa