Malicious PDF — malware analysis report

Static analysis result for SHA-256 585281bc7bc640bb…

MALICIOUS

PDF

89.2 KB Created: 2021-08-01 21:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 080749dab181ec391ec6cc00548a50f4 SHA-1: e45d9b37430cc6196214404861f40bc32d8338c0 SHA-256: 585281bc7bc640bbc84ae0d9138b1617fded2ad584a86ca48d4fd16008319bf8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://smidgel.ru/uplcv?utm_term=candle+wick+guide+pdf PDF link annotation
    • https://sokolzgierz.pl/web/uploads/files/foruvidizuzaladowomepites.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/47867735131.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2143ec53---xaloranijigapit.pdfIn PDF document text
    • https://ewt.cz/res/file/74729997200.pdfIn PDF document text
    • http://amdind.com/userfiles/file/nozisema.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/28241526085.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/luguw.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1b8f64076a1b0ecef8232a42ae393b51/mamogifodegekeguvokot.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/pesufa.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/71156538989.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/76p2ra2loc6hgi59tgi8rah6j6/52510756140.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/12444544757.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/91977288893.pdfIn PDF document text
    • http://dhf-china.com/d/files/29458770808.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/69805191634.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7f0b7e3417c77ad6047586cf0ebcbe08/73241268932.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/93165692e711c49597a2c23305531017/92515101756.pdfIn PDF document text
    • http://whatdwellswithin.com/file/46907593592.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/lemexij.pdfIn PDF document text
    • http://camonetinternational.com/files/file/23580064481.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/69940095940.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/45279605547.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd7ed0d976---sosukejax.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/2820967ee66cecf27fec574d7bed0274/wowaxazuvixew.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cfc0f3d8f---47257170063.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_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 17232 bytes
SHA-256: 113dfb2b6f5e3a6b264e222874a4445e5358390f714a6a77acc34d3879a66de5
font_02_sfnt_off00013e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E36 10620 bytes
SHA-256: 29fc62594e49e62e40e7360477d3064b0ed6f1652fd6117dd2d216a830e07551

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