Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cc2ca18082e6b3…

MALICIOUS

PDF

91.6 KB Created: 2021-09-07 21:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 501c6aac638cbfed664e95ec6995bb80 SHA-1: d84ac32c5dcc27f02587d74131e7d1f2206f5c67 SHA-256: 80cc2ca18082e6b3c953022c83713dae6f4310bc0f596a6d64b5fccd4c8327d2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly implies an attempt at phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://laborke.ru/uplcv?utm_term=socialism+and+communism+pdf PDF link annotation
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/79336951094.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072b108eca75---jagijixupabuleri.pdfIn PDF document text
    • http://mlight.cz/archiv/file/navimemuxo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/65i6n99qsvf9l9mhiel1p991t7/13953638447.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/54086332487.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/d9f6d8e518faec39cce6a311ad857f0e/5131782557.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/dolinuzaletebelederuvuj.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/32410776774.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/88079379074.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608442c8031e7---79623578933.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/dukutivixiro.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/towoxolaniwesikejotimeg.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/15734979470.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2455624c---wugifiwegesesipoduwadud.pdfIn PDF document text
    • https://breedlife.com/upload/files/51990175410.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/56002535505.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/25f56013e2dc2433f0c7abbc28f5381d/mizawel.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/viguma.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/pesiroxojavotap.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ee1a07429---wawoze.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161092b5c8f5c7---zotutefuvotifi.pdfIn PDF document text
    • http://brukbet.com/user_images/file/4966550352.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 17528 bytes
SHA-256: 66a37b2e6f3dec67c150f039fca7bfdf60ccfe92cfa59319a2ab365d466ef935
font_01_sfnt_off0000ff2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2A 18604 bytes
SHA-256: 006fc4ef531c7ff7d7d9bdc0b8b8a1269987718ac15f4f4ec6d1576cf7da7611
font_02_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000147c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C9 10624 bytes
SHA-256: 9ae5870b03def435247c3e533ddbef08dee82eb949fd5e4248a8722b100d5d11

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