Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a8365650229fec…

MALICIOUS

PDF

87.2 KB Created: 2021-03-28 04:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f58717c407eca4056bc76a9865aa025f SHA-1: dcb67419fee9e347a86f1945626b2759ee5fa17f SHA-256: f4a8365650229fecf52b289b36d46732ab427bd0feec4fca407b7900a45fe1c1
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded link disguised as information about 'Ariston washer dryer combo parts', which redirects to a phishing site. The primary technique observed is the use of a lure to redirect users to a malicious URL, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/strik?utm_term=ariston+washer+dryer+combo+parts PDF link annotation
    • https://cdn.sqhk.co/nafolekuge/VhhageM/29544659159.pdfIn PDF document text
    • http://erogan-columbia.site/hammer_house_the_jumper8t4o0.pdfIn PDF document text
    • https://wuwemupijebuvat.weebly.com/uploads/1/3/4/0/134012408/tovuzoxudu-keziwagom-sojitiweg-wunenumux.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/jgjjajj/22338628072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464315/normal_5ff7cf9ab62f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450145/normal_5fed31219427c.pdfIn PDF document text
    • http://matcobzor.ru/what_is_unique_to_south_australia_time1u221.pdfIn PDF document text
    • http://pochta-24.cc/is_the_ford_escape_hybrid_reliabley22ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5ff5cf813dd92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5fed999617eff.pdfIn PDF document text
    • http://reduslim-europa.site/1997_ford_f350_work_truckzjc0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_6014dc2be0fac.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/vebukederilanokasik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_60178c090dc29.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/eShhtWK/alone_lyrics_alan_walker_karaoke.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/fanoponapuzof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5fd700d9c59c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_60366640d54c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_a9aa24207b154ea3bcc229f83ea2d606.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_b1d95eb563214635ab4151bd7a39930e.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 5392 bytes
SHA-256: 3da3418ae2c063c74080d08775879cec1362bf063c0196419ac07ddd1d9895b6
font_01_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 10964 bytes
SHA-256: 9f2186db19288230b3b60fb37d79aff72489bbf9c9cf37e411f926efc5bb9f5a
font_02_sfnt_off0001413a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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