Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db0327e586e527…

MALICIOUS

PDF

96.8 KB Created: 2021-05-23 22:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a30b81f97169fd56d158e3e27f2c08e5 SHA-1: c745baa4aa4060c2fc288df67c4e4cdbccc082e5 SHA-256: d7db0327e586e5276eda0f2f3307e3efe7a83e5abb76d1d7eaa4fc124543e5a8
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or redirection attempt. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, encouraging user interaction. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://golowaki.ru/strik?utm_term=frais+de+retrait+orange+money+cote+d%2527ivoire+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5fe23700ae939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428342/normal_5fce4ce410969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489588/normal_6031ef3b26724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_6067f74b83845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_600b1d0337e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485570/normal_606200775b622.pdfIn PDF document text
    • https://xogukozatakik.weebly.com/uploads/1/3/1/4/131453421/aeba4.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/ponokabulo_niguzuz.pdfIn PDF document text
    • https://nivawapononagi.weebly.com/uploads/1/3/4/2/134234681/guwogurax_gofaserafarepex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_60302e54f2060.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/rakanesaxapikefuriwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447252/normal_5fe75bffdc61a.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://uploads.strikinglycdn.com/files/f27ec3d6-d298-4bb2-a640-9ec443788de1/how_to_fix_dishwasher_not_draining_ge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1f0502-41cf-4e5c-a2b9-f7a030c75904/how_to_clean_and_oil_a_ridgeway_grandfather_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/kidde_nighthawk_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2632a716-d513-4f46-a708-eb53a8c66e78/14372562487.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/android_10_update_google_pixel_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1880c0bb-2502-4f0b-8e08-9cf9c47125ff/nafulimusidarir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb9a775-3be3-481b-80cd-dce2a75344bc/poulan_pro_25cc_gas_blower_fuel_line_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297d7a62-f6c3-4346-bc46-11ae6fe60683/maluvekadabub.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/thunder_tiger_eb4_rally_game_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed91dbe4-50f0-4841-890a-0499111f7f0b/nitro_to_word_converter_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42422859-14e8-40ae-a58c-26ee5c5b605c/how_to_gain_strength_with_bodyweight_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/datibejuxipesaresabutik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b77911-629d-4a65-b4a3-20c9ea738307/14840119130.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 5492 bytes
SHA-256: 0305ba75d7ba47f6a0f9879088485669ec2a8bac2c54c2ec53d023ffe421553e
font_01_sfnt_off000128ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EC 13140 bytes
SHA-256: 86656cd6ed3341a9bb0fa5304384c78c9381a49254c72614e909dbde8f6163b9
font_02_sfnt_off000151d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D7 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off0001666e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1666E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333