Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d0768e64d4e2d1…

MALICIOUS

PDF

103.9 KB Created: 2021-08-17 22:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 819528ada58572fa1c29cc35c213ec9f SHA-1: d80790ea647408f03cd64f7f16cfefdb1f058a11 SHA-256: 32d0768e64d4e2d1ff6dd8c3935d5aac737c34dd83741b973501a94240c2397d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608866b062141---nimesogavelawepazitovib.pdf
    • http://e2ingenieros.com/ckfinder/userfiles/files/jalitopejitareta.pdf
    • https://toptenstudy.com/upload/files/BodyFile__60B2A3368A852.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e31ebb96---11338182673.pdf
    • http://au-zlato.sk/upload/files/liriturojiligaroxojavat.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ea30e0164---sadororisovudo.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/43f5f2538a4294b5206dea431a4adf5d/davivopesatifebifif.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b1f93f7ba6d2e8bc77ed3c43a982fb32/bixisubisudobosuditi.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/76472fa19fe28a56ae9a7aca41193491/9994633501.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481b62d255---runebar.pdf
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/jipowi.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/kefakobononat.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/m6e8djfnd1pjrp2dh8lugise28/43803860372.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608451514d322---pitudopasolep.pdf
    • http://akinmedikal.com/uploads/file/16682239818.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/eh2j4gjre6koqd14u7788u16gg/vusenoxosokivedet.pdf
    • http://www.vandiestbrandstoffen.be/uploads/files/lukavifubigosuve.pdf
    • http://aromaonly1.com/yamituki-n/uploads/files/juxinexufopumaneduwarotu.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/fogax.pdf
    • http://chinazzjx.com/d/files/kasodavegu.pdf
    • https://hotnews.md/upload/userfiles/files/37472401087.pdf
    • https://auditorescr.com/ckfinder/userfiles/files/79266450457.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/34vpfsqm6lj0cpslncr2iu2j90/30894018574.pdf
    • https://cevhertemizlik.com/userfiles/files/11790364619.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/runowurodurinukokiteveret.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ejemplo+de+estudio+de+factibilidad+de+un+proyecto+de+construcci%C3%B3n
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ddb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDB 16792 bytes
font_01_sfnt_off000145f2.bin
51d7cc3fa6706d787c9a1f32c63e2891e5c89a30b427607441f680b2b4d960a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x145F2 11388 bytes
font_02_sfnt_off00016044.bin
bef2f6fbd9605f158dcd343d3b247c74a1e191b589b74b2782b4e32dc859bc99
pdf-font-stream PDF embedded font (sfnt) at offset 0x16044 17688 bytes