Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4e8f180b6570b0…

MALICIOUS

PDF

80.1 KB Created: 2021-06-02 04:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 96f5d43eb3af47d57b504ef5118bba82 SHA-1: acf9739c916f7384dbac7b19c18054bc9fe1e124 SHA-256: 7f4e8f180b6570b09e59ae8019b5e107832fc774cf7e8a742020e2a972cfe0c7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these linked resources. The PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic highlights the use of disposable hosting, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://garglob.ru/pbw?utm_term=really+rare+psychological+disorders PDF link annotation
    • https://pixelisikug.weebly.com/uploads/1/3/1/4/131407736/kefaxojageka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_603003590a834.pdfIn PDF document text
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/vazudekub_lojumejanuw_wofafuzeli_nukevi.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/jepiludasurapak.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/suvigaxosonajit.pdfIn PDF document text
    • https://mipabewezodif.weebly.com/uploads/1/3/5/3/135315693/1d8912ccafe8.pdfIn PDF document text
    • https://sixijuzenej.weebly.com/uploads/1/3/7/5/137513745/givavunomijorized.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_6046417cbe3fb.pdfIn PDF document text
    • https://zorazuzibenad.weebly.com/uploads/1/3/4/6/134617736/4851012.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/mopevigexixip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d8d430-e741-4689-8c49-bd3297dc5009/54703896163.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144455322/wojoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d18742f-9c4c-4a70-9a2a-11bfc5f63548/lidoronaxufesukofav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7081b921-b2c5-4fb4-96bc-7fd92dc42b9f/subway_surf_hileli_apk_indir_android_oyun_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47b753a-3ceb-43f9-b903-606c193d2ed8/how_to_lose_weight_becoming_a_vegetarian.pdfIn PDF document text
    • http://fixiguru.pbworks.com/w/file/fetch/144476622/zafexunaf.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144483267/what_is_kali_username_and_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55fb464-de15-416a-bcea-4b0a717f32d5/how_to_redeem_fortnite_v_bucks_card_on_ps4.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/60703535781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f11d991-de8c-4451-86f4-6d80246ea25e/2019_jeep_cherokee_3.2_oil_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac3c66c-4f7b-41b9-af08-7aa467e4ebd3/ganongs_physiology_examination_and_board_review_download.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144427893/what_is_definition_of_terms_in_research_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f3680d-eb04-4915-9b55-6417437c1e3a/netgear_wnr1000_v3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e3039b-f7fd-40c6-a651-201c7e9e3aec/71731828777.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_off0000fa07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 5444 bytes
SHA-256: 8606b1c2036c47d52e1cf82677c8d5a7584968e04a0d671620c5e94233bd02c5
font_01_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10812 bytes
SHA-256: 5ffe048184a73bd25d94912a8a797c027f517b0974c348594017335381a04acf

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