Malicious PDF — malware analysis report

Static analysis result for SHA-256 0652f5dce62bdd01…

MALICIOUS

PDF

121.8 KB Created: 2021-03-17 00:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 49cec713313b89ddbd5e020d7b0ab13d SHA-1: 7e9195ecd3b341d2ab4d4383bf793b897a745ca8 SHA-256: 0652f5dce62bdd014445e6671f423851eb85d225ce03390a14eaf09f4c9e0dbd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an effort to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=pusheen+love+plush PDF link annotation
    • http://asta-stroy.ru/36133243463cbo8b.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/ic_cd4013.pdfIn PDF document text
    • http://bestplacefor.rest/jemoxejazovkp1xm.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/digekuvawan.pdfIn PDF document text
    • http://frukt.space/anger_of_stick_3_game_downloadtk6od.pdfIn PDF document text
    • https://tumugisoluxadez.weebly.com/uploads/1/3/4/6/134601474/demama.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/27355848367.pdfIn PDF document text
    • http://doordash.link/mayer_air_fryer_user_manualvwyey.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/dazuduma.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/tupatasoloketozajan.pdfIn PDF document text
    • http://perevod24-card2card.site/54009353613oscar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3baf5798-5a70-4bbd-bbd4-8ddd0cdb6214/50759449733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff1af11-30b5-4a25-9463-427791cfea2d/7206148349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1c85c2-ce9e-457e-811b-78866ba079da/dasosubugejixibajo.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_a31eb34fe18347efac63e43b13b276a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e656ba79-4e4e-4a2a-b723-7f6c8678b082/93781892393.pdfIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_5b5b1e0236a14e068a4f9e63b75fc64c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/35696185602.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_04f3473cdf654e679190d72e069890c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/sofojuvawalowoz.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_76578e92a9834ecdadce65316c0d16d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/tabosajam.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_off0001a0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0BF 4660 bytes
SHA-256: f19a173ace06a10a664693a5fa4e8dd218b602343fbe5ebfbcf5cf30c68d4cdf
font_01_sfnt_off0001b0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0A8 11560 bytes
SHA-256: 07fe7f87488a2d5e912b9b82ba6dff44d1f46a91d6d5dea4af5e079c1b83417e

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