Malicious PDF — malware analysis report

Static analysis result for SHA-256 c079e7059d6262b0…

MALICIOUS

PDF

86.6 KB Created: 2021-05-10 13:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b5a78d28af3531180cf9deb15325bdbc SHA-1: 2ad631a6b0326070db52494b2c0f5e3f5dc621e0 SHA-256: c079e7059d6262b0df8bc2ee5d3a0125c75b79966abe06e7e3c719a10b5c80bb
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing a significant number of external URLs pointing to various domains, some of which are hosted on disposable or less reputable platforms. The presence of a PDF_SEO_LINK_FARM heuristic firing, along with numerous embedded URLs, strongly suggests an attempt to lure users to external malicious sites. While no scripts were directly extracted, the overall structure and URL distribution indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/strik?utm_term=the+lying+game+season+3+2020 PDF link annotation
    • http://xiruzox.mygamesonline.org/11698929624.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/how_do_you_find_density_with_length_width_and_height.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/9974242.pdfIn PDF document text
    • http://dapukop.22web.org/performance_appraisal_in_hrm.pdfIn PDF document text
    • https://patoduwewoz.weebly.com/uploads/1/3/1/4/131483118/6863795.pdfIn PDF document text
    • http://lazinuno.scienceontheweb.net/coulomb_s_law_derivation.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/introduction_to_criminal_law_notes.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/26823421533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_1965b39aab8449f6a6edd00f0a112963.pdf?index=trueIn PDF document text
    • http://vibesevazetiv.rf.gd/52090564332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6db4db-4323-44aa-8014-869e5adeb228/hs_mini_maxx_6.7_powerstroke_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7dec1e-afe7-4cd7-a9f8-ed5b1381f514/98333734895.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_c878039db518467d9631a16585b1a8d1.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_b5342293ca8c4e869615d23d1c20b560.pdf?index=trueIn PDF document text
    • http://sopenexu.epizy.com/54890046144.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_d8ab1b30d4de4a67b6d10ff6a52b967a.pdf?index=trueIn PDF document text
    • http://tojetejuru.rf.gd/goldman_s_cecil_medicine_free_download.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_24a6bd94bb364a08935281d99539c660.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_f6cfbf137062418394c95fd6a0bba7a9.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_2075ee7f3f944bea8ffc0dbc25cd78ff.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_e4a46aff8bb848ea826d6bd23125592d.pdf?index=trueIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_e0839fb5cfae4b57b680499d8267eb65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37fb9a0-1bfe-44a7-a4fc-da4981e773e2/lavuwigo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 5200 bytes
SHA-256: 12a1ae012c65ebcb1caa10d824be3a3c24ba6a1a42b972406a8ac7547c42da92
font_01_sfnt_off00011959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 10888 bytes
SHA-256: dfea24a2c34d1d2ffa01d697604ef4d81565155f754d75867b3a991d8ab36801
font_02_sfnt_off00013e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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