Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f5a80fda5b57ee…

MALICIOUS

PDF

77.6 KB Created: 2021-06-03 05:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f7df0b75cf7f2917bd40e0243d03fe SHA-1: ccfcf277fe8fc3169b261401493a400312badf2d SHA-256: 22f5a80fda5b57eeb1e04cb0285dc65ad2dee8767c33293cff9e3d207dcd4e39
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF documents, indicating a link farm or SEO scam. The primary URL, 'https://queure.ru/pbw?utm_term=how+to+clean+water+filter+on+maytag+washer', is presented as a lure. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to drive traffic to malicious or deceptive content, aligning with phishing and potentially malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=how+to+clean+water+filter+on+maytag+washer
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/9295329.pdf
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/9e4b8712.pdf
    • https://bekalerobo.weebly.com/uploads/1/3/5/3/135346313/fujasakagodarupe.pdf
    • https://pebitazoma.weebly.com/uploads/1/3/4/8/134849778/dibekofozilal.pdf
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/6240246.pdf
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/luxavunu.pdf
    • https://wodosokereso.weebly.com/uploads/1/3/1/4/131407547/de060a20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d4caaaa-eda3-4ac5-8fd9-17e00e71feed/xudenikexopuvuxabevewov.pdf
    • http://molitutolu.pbworks.com/f/how_to_adjust_water_temperature_on_rheem_electric_water_heater.pdf
    • http://mujefapufefi.pbworks.com/f/fases_del_proceso_de_investigacion_cualitativa.pdf
    • http://giribuv.pbworks.com/w/file/fetch/144540882/viriwaw.pdf
    • http://ronefete.pbworks.com/f/instant_pot_ultra_10-in-1_electric_pressure_cooker_-_6qt_reviews.pdf
    • http://fubajulak.pbworks.com/w/file/fetch/144426531/17130423715.pdf
    • http://redejok.pbworks.com/w/file/fetch/144514965/what_kind_of_sauce_is_on_dominos_philly_cheese_steak_pizza.pdf
    • https://uploads.strikinglycdn.com/files/0c51e84e-6d92-4a76-87e0-128a42b288c9/42295803614.pdf
    • http://wojipag.pbworks.com/f/vizobuv.pdf
    • http://ritijix.pbworks.com/w/file/fetch/144530046/fast_and_furious_9_full_movie_free_download_mp4_english.pdf
    • http://rasovuxosew.pbworks.com/w/file/fetch/144459456/kikolewago.pdf
    • https://uploads.strikinglycdn.com/files/917bb735-b133-462b-b553-cdc56945ac1c/68933303890.pdf
    • https://uploads.strikinglycdn.com/files/c21b4777-52ce-482c-be96-75a54f16ac38/throne_of_glass_box_set_used.pdf
    • http://dejimebez.pbworks.com/f/ligatafomofad.pdf
    • http://nigezid.pbworks.com/f/duwagivokuzovizuzaxet.pdf
    • http://fuzobonesujo.pbworks.com/f/zofogomijelupelelo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ca.bin
b0121b0464a4a110ddf23769dd9db6226f393f8d87249d23716ab573e501678b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 5448 bytes
font_01_sfnt_off0000fa3f.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 1800 bytes
font_02_sfnt_off000102cc.bin
f844bda7a3d828108e5f5e1932b8b273277846fd3ec79a80fb7611d16728e9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 11236 bytes

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