Malicious PDF — malware analysis report

Static analysis result for SHA-256 58aa254f73b8a22d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 14:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7450d6d5f4669a429b3af62b0118e59d SHA-1: 0a85fbd3ac2bcfe24e4b8d3a614ce13028b41e18 SHA-256: 58aa254f73b8a22d99d1df2b20e461abf5194fbba9253b9b09fd8367ee6b3e7d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/aws?utm_term=best+branch+of+mechanical+engineering+in+nigeria PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402280/normal_60450325e765b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416810/normal_5fe4f468cc4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_600e6a2bd8fb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_60071b95aea9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besatewu.epizy.com/apple_bug_report_search.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_3f833424a8b242db924ef7cc391e4adf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efb33ee-4250-425e-b8ed-f539d00a607c/los_tres_hebreos_jw.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_243334a20af6454c8f77365a62380a9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/figaviwapid.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/itunes_windows_10_without_microsoft_store.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_0937b51fe12047d8b7fb79bd0577d68a.pdf?index=trueIn PDF document text
    • http://kotalozobazad.rf.gd/redanexojibefirulig.pdfIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_0b8220a11e754a8b93d99c9ffe7905c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2978073-bde2-42e0-9b4f-24598dbcefd0/what_to_do_when_service_airbag_light_comes_on.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/danekabavusikofizezasu.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_a95dc4c50c9945c3887580b4dfc59945.pdf?index=trueIn PDF document text
    • http://zukewanika.rf.gd/reacciones_de_combustion_incompleta_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095a734c-7271-4c14-b4f9-141d051cbb88/35094425361.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_014223126a4340a18f9eaf4eb5307c7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f31cf5-3799-4595-951c-d928a191108d/lereniwatevasozud.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_464d3885bb37432c8c51c0c5d31a86d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5772fa9-0be6-46f6-b256-237a30deb925/dnd_5e_warlock_hexblade.pdfIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_418d2f44d0a54a709c0985936bcb4677.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/sweet_dreams_tn_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/ferrari_488_for_sale_houston.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_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 5484 bytes
SHA-256: 1f9a96d4ef39af210ffd9554d23903c7d3558eeabfb20c258a52af3c5045d839
font_01_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 10752 bytes
SHA-256: 82afb30c9a91f0a94ddf5357318e23fa17ac5272ab65b9f171cff3358084f433