Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d9bc9707ff894a…

MALICIOUS

PDF

94.6 KB Created: 2021-03-20 10:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb41ac94320c67d488a38e3bdffcfbe7 SHA-1: e480bd827d19a7ccc281a73072d9c91d05928045 SHA-256: c8d9bc9707ff894a6adcad6f7c2aa857ac8b1e9c43bdb9df9c778c78f6553765
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains an embedded URL that, when visited, appears to be a search result page, likely a lure to direct users to malicious content. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 4

  • 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://vilenefex.ru/wix?keyword=members+mark+ice+cream+maker+parts
    • https://cdn-cms.f-static.net/uploads/4388614/normal_6015ae7416d67.pdf
    • https://cdn-cms.f-static.net/uploads/4393763/normal_6034d8f256b2d.pdf
    • https://cdn-cms.f-static.net/uploads/4463002/normal_602a8bee92e24.pdf
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60556ffc8871a.pdf
    • https://cdn-cms.f-static.net/uploads/4450898/normal_60555cf90ac82.pdf
    • http://jaxagogilexet.sportsontheweb.net/82765867017.pdf
    • https://cdn-cms.f-static.net/uploads/4374839/normal_603d2ad8ac368.pdf
    • https://cdn-cms.f-static.net/uploads/4368249/normal_602111ce537fa.pdf
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5fca93c2a7306.pdf
    • http://kunepuvobimamin.medianewsonline.com/comcast_tv_channel_lineup.pdf
    • http://jigapenufi.medianewsonline.com/40206910792.pdf
    • https://static.s123-cdn-static.com/uploads/4413851/normal_5fc8792229ad8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kifobidurusidi.epizy.com/diruxijopuvekalogiwosinol.pdf
    • https://s3.amazonaws.com/xapidajovaji/articles_of_organization_llc_texas_template.pdf
    • http://fakexebubigej.rf.gd/sample_gradebook_sheets.pdf
    • https://s3.amazonaws.com/nefagolom/74166315497.pdf
    • https://uploads.strikinglycdn.com/files/6797a2e8-bbc9-4790-b334-5c7a22e639f5/97753366858.pdf
    • https://uploads.strikinglycdn.com/files/99355235-df33-4b19-86ff-01408f5311da/suzuki_sidekick_sport_lift_kit.pdf
    • https://s3.amazonaws.com/lixasifasi/armstrong_furnace_ignitor_canada.pdf
    • https://s3.amazonaws.com/timituvupame/sundari_penne_nillu_nillu_song.pdf
    • https://uploads.strikinglycdn.com/files/965723c6-066b-4aaa-bffc-4a98b20add3c/what_are_the_qualities_of_a_good_wife.pdf
    • http://girupesoja.rf.gd/nijusokudobilaf.pdf
    • https://uploads.strikinglycdn.com/files/851ecf84-b7c3-44e8-9b65-65849d057513/water_supply_and_pollution_control_8th_edition_download.pdf
    • http://kupaxomuwekag.epizy.com/benugat.pdf
    • https://s3.amazonaws.com/lakadutof/the_last_time_we_say_goodbye_synopsis.pdf
    • https://uploads.strikinglycdn.com/files/10b766eb-742f-4ea1-9697-8108c259b45d/occupational_stress_inventory_revised.pdf
    • http://dexegesen.rf.gd/90357614903.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_off0001279c.bin
20c744ac3ebc65e10745e90d3cf3d956e84c595a7648b176828a69574d161a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1279C 4828 bytes
font_01_sfnt_off00013805.bin
0530698a47874ad8111e5f91aa67f9fdb87690b1e495741a26f7341e60ead02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13805 11176 bytes
font_02_sfnt_off00015e03.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E03 4324 bytes

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