Malicious PDF — malware analysis report

Static analysis result for SHA-256 2696a93d2d98b256…

MALICIOUS

PDF

77.4 KB Created: 2021-03-14 21:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2fb36954b15b0584560ac03ffdbff25e SHA-1: b081bbb48a79760948d6aa72cdac39d8ab04f652 SHA-256: 2696a93d2d98b256b27fc9ad3cfe7730da4ff89e2284f81d6766a641ea4ef9d5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity rule for an SEO redirector link and a critical ClamAV detection for a phishing trojan. The embedded URL, https://nipisod.ru/123?utm_term=gunstock+checkering+templates, is identified as the primary lure. While no scripts were explicitly extracted, the nature of the detection and the presence of a redirector URL strongly suggest a phishing attempt designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=gunstock+checkering+templates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496001/normal_5fd0e1e2ccd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_600d701528f76.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/9269893113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601794d41dda0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366382/normal_5ffc60d6883c4.pdfIn PDF document text
    • http://pagipuniluti.iblogger.org/figigedakizadezitutuzime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fe330d80f22f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fd97a9be89dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_60333d7ab9bd8.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/le_liberalisme_est_un_peche.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujesulad/minecraft_map_mansion.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/85872192304.pdfIn PDF document text
    • http://moxesufuv.rf.gd/is_surface_mining_dangerous.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/oneplus_3t_review_android_authority.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/foods_you_can_eat_on_the_wild_rose_cleanse.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/cash_flow_chart.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/small_gods_audiobook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cyberghost_vpn_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/pixisexapebewumujukokonaz.pdfIn PDF document text
    • http://kudipam.epizy.com/47619896497.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/20889614714.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/fajerekikizotamularufolip.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/60385458709.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_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 5444 bytes
SHA-256: 1d24b3c57584031ace89791e37e76952fd75c79e4b23f60a73e2ab43b48b8eb2
font_01_sfnt_off000100cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CC 11308 bytes
SHA-256: 9aea87c34e48dfbc371653824eb555a4729e9fecb0f049d2e1661422f43655a0

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