Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f5bb8aacace5ef…

MALICIOUS

PDF

80.3 KB Created: 2021-03-27 15:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7035e3440cb90296643f46d30aa23826 SHA-1: 08d6bc104a3c8bd11f7da7ceddb8012e61005a93 SHA-256: 35f5bb8aacace5ef81a898bad4e0de7052b1276d431f05b202e43ac25d2299f0
244 Risk Score

Malware Insights

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

This PDF was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as 'https://crophysi.ru/wix?keyword=integrated+coordinated+science+textbook+pdf', likely serve to phish users or lead them to further malicious content. The document body is heavily obfuscated, but the heuristics point to a clear intent to redirect users to external, potentially harmful, sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=integrated+coordinated+science+textbook+pdf In PDF document text
    • http://fudoviwil.mywebcommunity.org/logos_rhema_ministries_international.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/togajozudomitonuv.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/lettre_de_demande_d_attestation_de_fin_de_stage.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/add_text_to_linux.pdfIn PDF document text
    • http://lezirumari.sportsontheweb.net/canon_6d_mark_ii_specifications.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/figanavidovurutodu.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/6303607.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/sedomexoxirezo.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/d6ee4d18f.pdfIn PDF document text
    • https://vetaguluxidi.weebly.com/uploads/1/3/4/6/134656260/762a549d.pdfIn PDF document text
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/53ef86c.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
    • http://pidusagi.atwebpages.com/sovopujib.pdfIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_414342d17d264458a9abd76cae853d5f.pdf?index=trueIn PDF document text
    • https://eeff404e-5492-4914-a1d7-e39d1f35e6b2.filesusr.com/ugd/e58d70_424fbea1500944a9aa73aeabab4f91fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/213daf66-82cb-432c-9971-2e8572ba2899/will_turtle_beach_stealth_600_work_on_ps5.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_66288a50b3cc4eb68b51610d5d09fdaf.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_b85c7fcd9fd3467086c2bc0fd6fed141.pdf?index=trueIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_6eafcf19020b41afa769e6b22cbce42b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba90a59-1069-4f85-9b9d-18aa361f0e68/robert_a_monroe_hemi-sync_the_gateway_experience_waves.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_384890a600234940918371b291ea5983.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae98539-5f28-42a5-824e-7e30a5c49a5e/molodajibobaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a74e8e-e22d-4c96-99c7-a69bf6fb323e/zilisufibek.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_cd744269bea341358ada9318ec77e694.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_95cda62bce6c43bfbb5f0bc48be1c0a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6afd84-faae-48ae-bcca-f1433dff4343/68236539276.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5288 bytes
SHA-256: c48ab84fea8ee487a7d294239d67969d98b3034ecc1ff61f0aa5660b83476e13
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10712 bytes
SHA-256: 181d81ad6aeeffa858e8879b6a0d6518c4708cf5e93a748b359ebe2d2e2978da
font_02_sfnt_off00012399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.