Malicious PDF — malware analysis report

Static analysis result for SHA-256 96105f11919e5df3…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 16:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3650d68f9f03a0cfdfde0141ef4c5474 SHA-1: 31a0f8b68c4c69a88e6777ee2bd5523617bdc463 SHA-256: 96105f11919e5df3b95e53798a2c46401dc7e928c03df1f2a87d8678b9192ce1
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The presence of a 'link farm' heuristic further supports the idea that the document's primary purpose is to redirect users to external, potentially malicious sites. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=need+for+speed+no+limits+mod+apk+free+download PDF link annotation
    • http://smartdeal.pl/files/upload/files/31004435885.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/87263034437.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/54uak32uoul516vvtiudnlsvi6/wubiv.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/zezegovivumam.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/22980849973.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/40137067156.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/fewuwazizuwu.pdfIn PDF document text
    • https://jdconstinc.com/ckfinder/userfiles/files/77265967252.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/zemonageku.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/87112448547.pdfIn PDF document text
    • https://vietcuongcorp.com/uploads/news/files/33147454409.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-27/20210927140013845575.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/nojunewasotej.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/61744626369.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210905041054182.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161463fee9200b---gaxij.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16141a7d6b76c1---63794153056.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/15501902430.pdfIn PDF document text
    • http://meta-min.com/files/rozidibeba.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0ba6d3ac22c62cfb706949fad3e6f259/gepugiwesoxapoditax.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/47395310636.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/15837997759.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/2598195064.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/fugakejus.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_off0000af73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78A 10816 bytes
SHA-256: aab7e474fb0f8ff6ab4de27c6c765b4f97e828723626214a5483018dde1ee4a5
font_02_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 14888 bytes
SHA-256: a9d9359eeb51f8a61086b884f9c63b918bbe863c4ae2ca585aa5784e6e821d1d

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