Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f04fbb478a22863…

MALICIOUS

PDF

83.3 KB Created: 2021-03-29 01:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b3897db36c7b360d0579eb861f7b698e SHA-1: 552d53dad743a3f891b8790b5a28dacb4136baae SHA-256: 1f04fbb478a22863849ab936abd44aa6df8514bbee0355e135b715b32301105b
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=gallery+apk+2020 PDF link annotation
    • http://lnstagramsupportingcenter.com/vekamowenujegervm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488116/normal_5fcbcc49a9d90.pdfIn PDF document text
    • http://cucoupon.info/893023428701t6u8.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/9918524209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd636fb4d4e9.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/59816011759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fdeb19c794e5.pdfIn PDF document text
    • http://xeeewq.xyz/anova_sous_vide_instruction_manual236r4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_600b2c6f59a8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/903fd916-7172-419f-9eb1-a109f148e7d4/gerizivi.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/munujigununopajatosax.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_18823c05bb874db6bb3eac38c3a68601.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a63d51-ec36-44db-abe2-0c79381b03e4/dd_3.5_book_of_vile_darkness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cb26f4-de7d-4107-b006-03d0de043a48/86224249915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c96ce7e-398a-420c-a9ec-a8dcee7c66d8/pak_army_officers_protocol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868dd65c-3176-451d-8ffc-a515a5ac4fc9/70437378500.pdfIn PDF document text
    • http://sasaxunofob.atwebpages.com/vinop.pdfIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_676ab22f96a74d7d81ed86ce11749799.pdf?index=trueIn PDF document text
    • http://salajire.onlinewebshop.net/salejugorusejipexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497298e9-f7a2-4cfe-aaf7-d435afe6bedb/66288683322.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_8e70bc7197a843bb994833fb6126062c.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 3572 bytes
SHA-256: 5ecc1f24f659fa4f4c33b3b4718bd53118752e153fd86674297aaff8e2906bf1
font_01_sfnt_off0000f9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FA 5108 bytes
SHA-256: e2be8ca86c6e6091618feff186fcd391a484b2b9072da60cdfc37a215468ecbc
font_02_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 11316 bytes
SHA-256: afc67316de07c890e796f02f634e70619dabac3b5f770a08d267188fcc1c9592
font_03_sfnt_off0001323b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323B 3292 bytes
SHA-256: 496a6d421185b490cf49c451166fbb49dcda3c4dc724ba80d9bab3fc8fba7855