Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e743c495a7d367…

MALICIOUS

PDF

70.7 KB Created: 2021-09-09 02:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7b476ea1a1601203581f5a1cf4c88eda SHA-1: 168e8e4f8b9bebeca73216b2924414c48e614a8d SHA-256: f1e743c495a7d3675924ad34637838879f8cf6cba46e17d0a41891465c5b02aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript points to potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=how+to+secret+screenshot PDF link annotation
    • http://mbfeed.vn/upload/files/favematemopizozizi.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/velebugozakoxupus.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/14990537213.pdfIn PDF document text
    • http://c-amc.com/upload/files/16639384126.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/20797465654.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/63792323006.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/bcc3c3607776e8d1a4dad4ab21c3c8b4/33336077030.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/doxegeje.pdfIn PDF document text
    • http://safetruck.gr/images/file/senope.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/wenagoxiruteref.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210901122706.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/wedifigisopok.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8776af585d463c9c2f684f9e0076ba12/zorabeziwokedaxeve.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314836c9ad6---4526169395.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/q1q28ldb9vsvuesp7ai1s4hoh6/17493039014.pdfIn PDF document text
    • https://cplastik.net/data/cms/file/zison.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/kiverawasibavudoxiwigaji.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/89695296619.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/winedinuguw.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/17809299172.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613004c6aaaa9---tibojidonepojowobedazez.pdfIn PDF document text
    • http://i-physiology.ru/upload/lubibabogomog.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/wududivugevuxoxutesufom.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/fetabo.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

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_off0000b684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB684 15808 bytes
SHA-256: b3a244052f75e12c184bc1bf4a46be897dac4f1f99f396d9390f3317c0d17b4b
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 10104 bytes
SHA-256: 70a125b09eb2e73ce5e1346ad33bb1e5efe36da07180752ba1c409d69003a9ea
font_02_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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