Malicious PDF — malware analysis report

Static analysis result for SHA-256 375d888b8d02945e…

MALICIOUS

PDF

83.2 KB Created: 2021-07-04 08:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b15e1384ee765c841cb1d6e921e99253 SHA-1: 0884b6f451dc535d9e5d715da406948d5c0c3c21 SHA-256: 375d888b8d02945e4ea6bed05cb4deb99fe3052218e3c2d0d8ba27feb61c6193
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a lure for phishing or to distribute further malware. The presence of 'invoice' or 'payment' language, though not explicitly detailed in the DOC BODY, further supports a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://study-go.info/wp-content/plugins/super-forms/uploads/php/files/c432f3d9150e1c5fc6689a971c8d77e5/zibukudexuwawomasideme.pdf In PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/902df2eff6d240eac5b48e7ab73e1434/nemoguvijuragopiv.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uvuv51baaoicd8acsp938rq4vv/zajujipomonesanos.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/19184183178.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/07bf601800d1f27fb065e35d86db1ded/76580285471.pdfIn PDF document text
    • http://allycatering.com/userfiles/latijibazekifaniribakij.pdfIn PDF document text
    • https://mashura.co/userfiles/files/ketelemasipetovemisawad.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/rozuxoputogodi.pdfIn PDF document text
    • http://clingac.com/d/files/dizewamisifazeligosudu.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/cieei6d7usso1i40q57e7j24so/72476142650.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/fba775c7ee76f32e6bd1d55dee57b4c3/87874247725.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/53550377241.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083f1a4c1890---82697966692.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hd92heevgja1jarurrrkksvogk/fexolo.pdfIn PDF document text
    • https://vestol.bg/files/file/9951806603.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/nijonufe.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/l1dvlkccs2h42lu8d25q9s2bh1/55432176427.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e2510c9c4babdfacef6f5cc8867ec425/kepuxitir.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/tudafakula.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/284ff244a3ed55699206eb5e0570131e/24993855346.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/76861105629.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/fanivemagitek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=westie+x+jack+russell+for+salePDF 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_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 17588 bytes
SHA-256: 312c549422eeab8d110229d95cdc7e52780b789eadcb9f19d20e7e70dd3ab5c8
font_02_sfnt_off00012763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 10640 bytes
SHA-256: 823a78ab437b3e4e373a90cb186fa21764d3d20c815f153b9b1dca7aeb184346

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