Malicious PDF — malware analysis report

Static analysis result for SHA-256 8449b3fbb7a1bc88…

MALICIOUS

PDF

79.2 KB Created: 2021-03-27 17:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 77cf958a0210d66fac23f4f9f2f9d029 SHA-1: 94e6245d857e523ce98f7215cc82abcd734b4416 SHA-256: 8449b3fbb7a1bc88264477c6eb5e4a9ce7b612730f6d0974d688ad4622e167da
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to an attempt to redirect the user to potentially harmful content.

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://maypoin.ru/wix?keyword=express+scripts+interview+questions+and+answers PDF link annotation
    • https://sezifiloxoxo.weebly.com/uploads/1/3/5/3/135348424/letukonolarez.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/53478070921.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/haiaiaY/king_s_college_london_business_management_ranking.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/sokatarotojupura.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/71b95c59b8d.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/1Mjfmjf/killshot_movie_streaming.pdfIn PDF document text
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/namitawunavadixir.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/RY0vgga/directv_customer_service_phone_number_us.pdfIn PDF document text
    • https://zanomegujinax.weebly.com/uploads/1/3/4/8/134873542/99eb739665c4c1.pdfIn PDF document text
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/vewonume.pdfIn PDF document text
    • https://pibazamigudixo.weebly.com/uploads/1/3/4/0/134000525/3540479.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/55084043680.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/b82c62c990d8.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/dGhijcv/block_puzzle_jewel_legend_pc.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/paxer_pikawezejuro_wididumozed_mozisijajoda.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/db034b87-b7cf-4e64-982d-2e0e13ad8dd2/jebamewitegefakax.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_df976078d8a14818a14432927c8ca69c.pdf?index=trueIn PDF document text
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_c95fbcfa61074fe296c355971b728305.pdf?index=trueIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_112179297d024580996819ccb733e23f.pdf?index=trueIn PDF document text
    • https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_d917eb83576245f2b225a26c03e67592.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff68e6c-e58a-461d-ab6f-9196a90d3158/shop_interior_design_software_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba1b0f9-d4eb-4e05-803f-75d68b140ea2/jixonefoxonubupimowuxoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ccf108-463e-48e3-b6c2-2e6a24963755/tl-wr841n_firmware_v11.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc7ac1a-078f-46e0-94d4-8e84002de368/legally_blonde_jr_tracks.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_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 5340 bytes
SHA-256: 512befd809d33384d8ba70c7d5e52ca44c79ef084b11ea39c7a74b27cbd4e1eb
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 10544 bytes
SHA-256: e2db64a559785c818e311cb2236a038b1ea0ab66a04301382ec1eb32633eecd8

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