Malicious PDF — malware analysis report

Static analysis result for SHA-256 07979405523658e4…

MALICIOUS

PDF

78.2 KB Created: 2021-03-16 06:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0d955105e7590f157f7cd4a0650865d8 SHA-1: 2faaa9c9295dda8db5aadaee0ea73359e88b4359 SHA-256: 07979405523658e47ff15b655a80049773579373e59a7206b39a3f940aa96d29
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/wix?keyword=swagger+should+not+have+additional+properties+requestbody PDF link annotation
    • http://fresh-ita.fun/zafugawitunawa363fg.pdfIn PDF document text
    • http://ita-fitness.fun/wofaf4gfrt.pdfIn PDF document text
    • http://ijmalan.xyz/loon_fly_tying_tool_kit_reviewetsfp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_603eb4d52bdb5.pdfIn PDF document text
    • http://itabody.space/juvitebigogoporas46986.pdfIn PDF document text
    • http://trujillostacoshop.com/what_is_the_mendels_second_law_of_inheritance6824q.pdfIn PDF document text
    • http://hargotel.xyz/zafowivagofap4gyz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6045f34d9abc9.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/computer_application_in_mechanical_engineering.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_60462fb23c5b9.pdfIn PDF document text
    • http://usesol.xyz/age_of_sigmar_core_rules_errataw1z9d.pdfIn PDF document text
    • http://dutov.org/tilotogetovinivekuxalutoy63de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_604d5ef93391e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_ad20ffcadf4c46e98fa56ee2f56fef35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ximupuv/wutusitufag.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_3e90c5fd0a4b4a9ca0fdd1711ad74cde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/26464497108.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_1edbabe3233f495e8a5b320545003246.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabevog/kaxoxopinalusezukufive.pdfIn PDF document text
    • http://gubadif.myartsonline.com/sadekosinukoto.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_316dfc9a202c4703aeb52d58978186dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/maslow_self_actualization_theory.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/50453153125.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_7c3a60ca32cc4dffa5657e8b104eabbb.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_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 5844 bytes
SHA-256: 86ea6e56be656b46a71999778db9aae29840de8fd194e0d98032c03bad6d383e
font_01_sfnt_off0001046d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 11320 bytes
SHA-256: 44a89868f0b965580b26b05eb84ff5458f18aba914d44cc1cfba044ba9da7f0d

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