Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7449e11312acc1e…

MALICIOUS

PDF

83.6 KB Created: 2021-03-27 17:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 078fbf3277f85a5184b70eff3a7b3f6d SHA-1: 6ca5f10c06c235f41811f8aaaf38d5d99c28da18 SHA-256: b7449e11312acc1e4362a97b4f2369787c8060bd80d6c737618e4f3248aabc5f
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to software cracks, and the embedded URLs point to disposable hosting and link farms, indicating an attempt to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

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
  • 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://pelibifir.ru/wix?keyword=cracked+after+effects+jail PDF link annotation
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/katuperululaka.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/6804348920.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/18323499630.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/national_awards_2020.pdfIn PDF document text
    • https://papokekes.weebly.com/uploads/1/3/4/5/134599002/gisij-gumuwavapegero-palikaxina.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/ruxisib.pdfIn PDF document text
    • https://rufutegimojev.weebly.com/uploads/1/3/4/0/134040423/e32a815093d3.pdfIn PDF document text
    • http://modusebipiz.iblogger.org/ipad_mini_4_price_philippines.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/30425147842.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/iiTGjgQ/earthquake_california_today_twitter.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/7351846929.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/dedemomivanaximexorobukuz.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/wisdom_of_solomon_5.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/isgghgk/bovubebexexaturodife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foropaje.rf.gd/90085766086.pdfIn PDF document text
    • http://bajanibutibo.rf.gd/redinut.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/telagavexe.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/popovinipewirelowemubef.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/kufirop.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/guided_mindfulness_meditation_jon_kabat-_zinn.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 5060 bytes
SHA-256: acf459bec4e210b22c4201f32e64ecc6b82aae2b5b0a29876ac93f61e6db1fc1
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 11344 bytes
SHA-256: c60f91c19e93bdb8ca1973fbcf5fa5008904214289b5f5f212abca7a5ba17dbd

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