Malicious PDF — malware analysis report

Static analysis result for SHA-256 108f9c6710821ed8…

MALICIOUS

PDF

74.2 KB Created: 2021-03-13 14:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: beed5d9cd3c0c1b0d07386c6cb67d9c9 SHA-1: d64cae1b5a46189e59aa26b4e8d2e2f8df2a269f SHA-256: 108f9c6710821ed8ea811bdf745346fcc33e2704b20299bb1287135b649390fb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/aws?utm_term=can+turtle+beach+work+on+pc PDF link annotation
    • https://juxapokidopelif.weebly.com/uploads/1/3/1/6/131606881/kufig.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/what_kind_of_products_does_nike_sell.pdfIn PDF document text
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/9077507.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/lerusugigufekazaje.pdfIn PDF document text
    • http://naturalm.space/pugozipanudi65nef.pdfIn PDF document text
    • http://gibelepij.scienceontheweb.net/como_se_hace_un_arroz_integral.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/8399681.pdfIn PDF document text
    • http://dreamingdeveloper.com/how_to_tell_if_your_meat_thermometer_is_oven_safez3drz.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/nefenixuvezedigorax.pdfIn PDF document text
    • https://konilusikiwi.weebly.com/uploads/1/3/3/9/133986353/8095574.pdfIn PDF document text
    • http://options.expert/95240505660e0yzy.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/roxamowexojobilej.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/bofirup-volaronegagiz-fiwonarujunofog.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/334519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_a90901b406f4405b8b222dec48fc68fb.pdf?index=trueIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_f5281df112704f08a4341b12f4dde041.pdf?index=trueIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/42489854795.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_55eb67c8dab44be1a41ce76fb006748b.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_ee60aa881eee4f038ceb0d64c9eff3c5.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_9c107b623f874da389fe44940f255a3f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 5044 bytes
SHA-256: 43b104b0e35137f64152dfbac535fbcd80b6cb4b440631c812fbc42162c47043
font_01_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 10824 bytes
SHA-256: 5dc391f88d4ffefb54b39e47af454302eb21ec8cd3c5ea279c5135e4cf5f9d28

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