Malicious PDF — malware analysis report

Static analysis result for SHA-256 832b19154f462156…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 18:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f2f7a80f5dadf1f248d25b927c59a594 SHA-1: e7efb68794aeba868b5098ac7dd3b4ff9bec31c7 SHA-256: 832b19154f462156a6fa65ed69d475831324c4a721a256ac79c32e067069d15b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious or compromised web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/5843c47a20d6d8b23d46a5ecc617d9d7/31632100639.pdf In PDF document text
    • http://ferrocom-spb.ru/userfiles/files/87092159946.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160773843935b9---mizakinimobedigofesubolix.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/garowaxijupajiwiju.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/41051885869.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce50f29bc---89987228310.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f0b4288e---fewoma.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/754rpc63jsuh9b3dvnd9bf9cu2/bugezubamip.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827f5f2aee1---50756356645.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/toganuvelagaso.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a0jkta224afvtbbr9ga798epr3/61587349305.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f57338f17a---kexivexiranejinifagirik.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/xuxig.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/84321461944.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/zugarogiwum.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d7648c4f7---99755977368.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68dd907f86---rapevit.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/ve0tnlapd4tm7jl1hd109uqhni/10662390595.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7e56c29b989420ae29ce6e7378aac5e6/62460307937.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/davujudevalibukimevorim.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1e4083bcb875435505805ce7ee5123e6/85261818866.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/xiwotal.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ea86ca9af---bezegizexinijixivuradet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=user+manual+design+inspirationPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 10840 bytes
SHA-256: 63bdd6fda86279a7580cf37e9d74ebf2e6ef6ec29a1fe5fe0b0f3852e42c74b2
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 18172 bytes
SHA-256: e60604ca3639e708c9b2bacf066520b94bddd4b9c3910f2fb1b9aaa57a6d98e6
font_02_sfnt_off00012c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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