Malicious PDF — malware analysis report

Static analysis result for SHA-256 71701ea59e5a8fcc…

MALICIOUS

PDF

78.1 KB Created: 2021-03-11 18:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2517b4a2221a18c8b6d196dbf7127ed SHA-1: bea7c5babd53e4a732c5d8ddd07040ac2bfe7ac7 SHA-256: 71701ea59e5a8fcc3467b7fb6d76a69c6b3e1daa4543c578b453c3af387d514d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are hosted on dynamic DNS services or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=naming+molecular+compounds+worksheet+key
    • https://cdn.sqhk.co/vizinifum/2ghdgkS/64685971071.pdf
    • https://cdn-cms.f-static.net/uploads/4418984/normal_6020508e40b10.pdf
    • https://cdn-cms.f-static.net/uploads/4404133/normal_60352fc9e7d69.pdf
    • https://cdn.sqhk.co/xiteduva/jbxibhh/50962159235.pdf
    • http://postel-na-zakaz.ru/dell_ax510_monitor_driverzhkwz.pdf
    • https://cdn.sqhk.co/pigalixow/icfieq4/kupugagi.pdf
    • https://gavurefeg.weebly.com/uploads/1/3/1/0/131070452/a1503399e.pdf
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/fasiluman.pdf
    • http://autokenn.com/33655176358n3ux0.pdf
    • https://cdn.sqhk.co/vadavenaw/jchbbrW/7410291434.pdf
    • https://cdn.sqhk.co/lazogapuvo/i37hghd/sarefupeloxun.pdf
    • https://static.s123-cdn-static.com/uploads/4393889/normal_60037d27745b2.pdf
    • https://sokijolixorinus.weebly.com/uploads/1/3/1/1/131163896/tosituvakawe-taruliwidot-bomisu-fijotewugukez.pdf
    • https://cdn.sqhk.co/fusuwudofal/evi9jfq/top_speed_drag_fast_racing_3d_apkpure.pdf
    • http://plsale.pro/autobiography_sample_templatexk6b2.pdf
    • https://cdn.sqhk.co/jigugabopu/dgjGHif/agar._io_online_spielen.pdf
    • http://onlajn-kassa.ru/86741739076ai40v.pdf
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/lusome_xajagemu_zinodevaber_xodemokivopafab.pdf
    • https://cdn.sqhk.co/widexerun/ccbn3ja/19924703989.pdf
    • https://cdn-cms.f-static.net/uploads/4454167/normal_60111f2c540d2.pdf
    • https://cdn.sqhk.co/juselivo/cihzDgg/23812004776.pdf
    • https://cdn.sqhk.co/sonometa/OOOhhhb/jakixamuw.pdf
    • https://wegizazuxiri.weebly.com/uploads/1/3/0/8/130814830/dbf8569ac35d.pdf
    • https://cdn.sqhk.co/bisadumiza/hhg5gf2/utorrent_pro_apk_free_uptodown.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f4.bin
ea9c2b54b54cad7206d0b272bb607923fe1ea05bd0af13584c41bb56eced9a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 5712 bytes
font_01_sfnt_off0001055f.bin
3ce7f6b10ed22ed343448e6919111a9795a82201baf57fa3474069f0a1eeed77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 10840 bytes

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