Malicious PDF — malware analysis report

Static analysis result for SHA-256 a884af88c4581e1f…

MALICIOUS

PDF

95.4 KB Created: 2021-03-23 14:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 71eb9c8f2f17c7f7adef5b310c4259ec SHA-1: 56e81687ac39f9c24ab31f9127bb7db877437809 SHA-256: a884af88c4581e1f83fef28064294a52f20fe990de932c0875573be792927365
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://nipisod.ru/wix?keyword=foundations+in+american+history+answer+key PDF link annotation
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/b74f8ac35.pdfIn PDF document text
    • https://lobududovidaxu.weebly.com/uploads/1/3/3/9/133997350/5998048.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/45574283624.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/sejaxamazifoni.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/hdbifgh/9021546982.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/mapa_metro_mexico.pdfIn PDF document text
    • http://lidzadva.xyz/gleeds_financial_reportbs47f.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/gfigejh/xbox_game_pass_beta_pc.pdfIn PDF document text
    • https://vizufawamowimo.weebly.com/uploads/1/3/4/7/134700475/612f5b01a90376.pdfIn PDF document text
    • http://ziratonis.iblogger.org/22236137990.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/fyy12Eo/word_wars_cheat_app.pdfIn PDF document text
    • https://gawuwusirijer.weebly.com/uploads/1/3/4/1/134108670/694ba07a1.pdfIn PDF document text
    • http://apeech.ru/caloric_gas_range_knobs6uv1k.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/cat_s_cradle_kurt_vonnegut_download.pdfIn PDF document text
    • http://beamorem.com/965847076586jlrf.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/tepugunaxulasulex.pdfIn PDF document text
    • https://bokawagorulok.weebly.com/uploads/1/3/4/2/134234603/nesafi_muwamani_xamavexe.pdfIn PDF document text
    • http://dafinopinodejo.22web.org/bowoxuzavufifoga.pdfIn PDF document text
    • https://dupuzebor.weebly.com/uploads/1/3/4/6/134639309/vusinuneguk.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/how_to_eat_fried_worms_movie_rating.pdfIn PDF document text
    • http://justiciaforjustice.com/52933087522mh8d9.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/hbTEjay/personal_panic_alarm_keychain.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/kezokimol.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
    • http://perexuwofogefo.onlinewebshop.net/igloo_model_ice102c-silver_manual.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/46969723003.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001376c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1376C 23304 bytes
SHA-256: 8dd4cbf7e204a395fc33c933435e1d9833bcf9e7d3a78b1393243572f974e337
font_00_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 5240 bytes
SHA-256: aa064ddf54256ceb2a1350d0e4112968f5ccdaad634ca2d55c2df853b3b19cdc
font_01_sfnt_off0001117d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117D 11036 bytes
SHA-256: a25f0006088d91248614fe5c093dcc474253f412a0c455a3e0b24a00c463a316
font_03_sfnt_off00016072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16072 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c