Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe60ebe2aa39442…

MALICIOUS

PDF

105.4 KB Created: 2021-04-08 05:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 060304e5d7db49bc38b48d75f29e7189 SHA-1: 02dfddb66a8f62be4ec79ccb55116a9cb729b8e4 SHA-256: 4fe60ebe2aa39442b05251c799e951913079d2398da2da3250ca8b8e3c76d429
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'PDF_SEO_LINK_FARM' heuristic and a high ML classifier score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links strongly suggest it's used to drive traffic to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://midufefew.ru/123?utm_term=mobile+legends+adventure+guild+guide PDF link annotation
    • http://naturebiolog.space/fubetaxoris46nhk.pdfIn PDF document text
    • https://cdn.sqhk.co/mixasuwekov/Lhhgmhc/xajoridejusukofefokiruvi.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/ixLgRie/911_drift_driving_simulator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/gnPt5je/nenatosujepelemat.pdfIn PDF document text
    • http://life-news.tech/poulan_pro_bvm200_leaf_blower_parts41wx2.pdfIn PDF document text
    • https://cdn.sqhk.co/gomurabog/Uqicjbv/72146359689.pdfIn PDF document text
    • http://latencfsrt.space/how_long_to_cook_chicken_on_infrared_rotisserieo5u2z.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/joxjaS7/pokemon_rumble_rush_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/Uhjsegg/loona_odd_eye_circle_girl_front_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/iejhqhg/pajero_turbo_for_sale_in_sri_lanka.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafuzivega/ghiczge/maxikerapi.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/iF4hcxg/starfall_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dojoxuwote/chaX6jd/designer_rose_gold_heart_ring.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/ihGXc1z/dark_raider_apk_obb.pdfIn PDF document text
    • http://bio-ita.fun/vipemonowggg1.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/fhihbgi/any_call_apk_old_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jewimebobi/jdjVPjj/1ch_wireless_rf_remote_control_switch_transmitter_receiver.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://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_761eb327192d4533ac9f9a5c85c05ad3.pdf?index=trueIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_3513bf4bfdc243f69c26b5ce92316f28.pdf?index=trueIn PDF document text
    • https://43e3b293-20b6-4b74-9f7d-0eefffb4d2df.filesusr.com/ugd/11595e_3d1e318ecdcf45c79b9b442edcea267a.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_768161361fa74f53a1d6820be282329d.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_2ab5bd5ab3e9442fbe0edf1964978dc4.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_4b26b63532b54f6f8572a722b42ad207.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_f063f79dd7cd487ba6a0fb41fb88dda6.pdf?index=trueIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_95ad7694224743e883cfaeb880b94837.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15040 5080 bytes
SHA-256: c01c3d330765589f181a7cba8320b53a7dedd64ed3164e430dd00b3c1dd04e1c
font_01_sfnt_off0001619a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619A 11196 bytes
SHA-256: 40b25536fa01def84fc2e43689b002a277d5b5c7d70784a6467a114a923328af
font_02_sfnt_off000187c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361