Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf22a55c4851a07…

MALICIOUS

PDF

73.7 KB Created: 2021-09-13 11:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8cd2a83be530674b467b87b86a53e927 SHA-1: 33a0a2c572a81b4482e9f92a22b224e9c9458db0 SHA-256: 0bf22a55c4851a07b2b1ad8c765eb3157a8a01f7ff33d3555f71bfc6efe51657
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a clickable URI pointing to a raw IP address, indicating an attempt to redirect the user to a malicious resource. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple links to disposable domains and a link farm heuristic further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://yalcinsezer.com/upload/ckfinder/files/foxorezor.pdf In PDF document text
    • http://getdol.com/page_data/file/xitinorokilupasonomu.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/71748323801.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/ronixud.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/wogoregixoz.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/medizipu.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/vivok.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/8531314494.pdfIn PDF document text
    • http://ore-processing.ru/d/files/77709103358.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/fenelorexeludule.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/49845776757.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/bapotadedeximafela.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/dagatipavad.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/baruzenekepatazogoso.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/vopinijexudada.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/losomifuwazaku.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/52684171810.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/favuzabamoz.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/65288524480.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/86822624818.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/ruwamukalesozepivozepuda.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/likikimugitewur.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210908_160710.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=love+2015+online+watchPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD56 10596 bytes
SHA-256: 2d7625878a934128305451a1c834336c3627395cfbf34ed31271236703092e72
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 17236 bytes
SHA-256: f6d6435103b5bf3d61c354b2e974181f720f5cda335b14b34eeadd5716c2cdf8