Malicious PDF — malware analysis report

Static analysis result for SHA-256 03082de10503cd58…

MALICIOUS

PDF

78.5 KB Created: 2021-09-14 09:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 64ddf07f1ba9605b214c93c5ff5fa0ce SHA-1: 255189af031870ad8d38b288132070ffbfbe24f0 SHA-256: 03082de10503cd583e9d8892e0d4ef7c00ed2770b9de56c1334ece5519b6c033
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable domains, suggesting a link farm designed to lure users to malicious content. The presence of external URI heuristics and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://archism.ru/uplcv?utm_term=papers+please+apk+android+2020 PDF link annotation
    • https://helices-evra.com/userfiles/file/fisuzafilupazefa.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/sororoposizudivosame.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e0cc7cebd3cb179f0121a20d3a397278/20365870907.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613091d4ce5e7---vuxojiroras.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kibopajuvid.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/sexerusukegonurikutiv.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/5376259811.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/pobenokavizosuw.pdfIn PDF document text
    • https://parkettworld.com/upload/files/piropusedovajoke.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/wutulixobejifokesi.pdfIn PDF document text
    • https://clickbox.ro/images/file/rulitugikobodaxugetak.pdfIn PDF document text
    • https://ptogel2.com/contents/files/74534016457.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kidexokijerup.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/95668904703.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/denamibudake.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/zikanifenigetadevav.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/vizapixo.pdfIn PDF document text
    • https://onwater.my/uploads/file/55132213824.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f424363fd2---xuxefowox.pdfIn PDF document text
    • http://zerosquareonline.com/file/69919036146.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/43340805084.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8eksd2avmb1svt8gnlcihncpf4/tufidekaxadexeze.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/73lqlhreef1fpkmo0ud9rg51te/32207955506.pdfIn PDF document text
    • http://15881588.com/ckupload/files/42446202448.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 17516 bytes
SHA-256: ac187a8fa72661282048df5f65cc3e6e0e9de56b7447bc3e4829831bebe890ea
font_02_sfnt_off0001142b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 10624 bytes
SHA-256: af837c13b7c99933aec4bf8002c99e7039833aaae1d8dd8e847ea8dd86f8b71e

Open this report in the interactive analyzer, or submit your own file for analysis.