Malicious PDF — malware analysis report

Static analysis result for SHA-256 987de3527d2ae0e4…

MALICIOUS

PDF

76.6 KB Created: 2021-09-04 09:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 142b8aff253ad6bbd8fe9e279e194c16 SHA-1: 986586c022bd07e5b70cf92f04518e4a8e769c76 SHA-256: 987de3527d2ae0e4eb922f26cc0447cc65b8fe7927e22ffcc063af64d5acdff4
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://cructi.ru/uplcv?utm_term=libro+texto+basico+narcoticos+anonimos+pdf PDF link annotation
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/3md2juaojvel2kmr8kdt3s4blb/juzajado.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/32941715095.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f06c231c151---88700320104.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/jufawonofaletodajurude.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sndjdg966pp6ea59ca10npus47/93765884850.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/b504bb00e4fff3ba3e11da2fdebf67f1/64891225617.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b878b497b---47557246766.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/162428812177730981956.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/79632497344.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/37987481792.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/zubumopebotifebisabulope.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798393dc379---laxagobokemavazefikuv.pdfIn PDF document text
    • http://bbgannualseminar.com/clients/6/60/607ac775fa755cf068047886b2bbe24d/File/fivozutipepeluvekapu.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210803090055.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/gudubujajewu.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/9bg3c812u0p2l64bbjuvanc3p6/68832699842.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/12143705145.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/sokikujifun.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/kalasume.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf6f113757---86466744329.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/70170087173.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1d71193d---suvikelumomolewediv.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_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F1 10936 bytes
SHA-256: 8c2c513fb2d8ad03f0da24cff847e65324cc254b1e3247a0fe3f353fe2c574ae
font_02_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 19612 bytes
SHA-256: 2dc7fecb94d321f0b4fbf51a9db6d1f08b040a86c74e31daa2476399d0c9312a

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