Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfea26eab874556d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 19:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf3ad5368fbc3b617ad3b643abcecca8 SHA-1: 7674ff3137cd8d4fd79e94cedcc11cbe2b5cd6b1 SHA-256: cfea26eab874556da6179a408014a88576127cc9855bf0f62ec3c47ee923d35f
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that, when clicked, leads to a malicious domain. The document body, though heavily obfuscated, appears to be a lure related to vehicle maintenance, likely to trick users into visiting the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/aws?utm_term=how+do+you+reset+the+service+engine+soon+light+on+a+bmw+325i
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5fe64b1c8ddf4.pdf
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fff5d013b51c.pdf
    • https://cdn-cms.f-static.net/uploads/4414680/normal_602d9637c1b16.pdf
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff22114e6a5c.pdf
    • http://dapunajav.22web.org/zubigigixiwubiranedeg.pdf
    • https://cdn-cms.f-static.net/uploads/4393754/normal_6031ee9712c91.pdf
    • http://binisamekogona.iblogger.org/dumazonepi.pdf
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5fc7f0ec34fab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bfe19526-d56d-4d83-bea0-ece16e078624/problems_with_samsung_dishwasher_dw80f600uts.pdf
    • https://uploads.strikinglycdn.com/files/69617de1-67c3-41f5-b9b8-1cbcdce4fea2/86669539774.pdf
    • https://uploads.strikinglycdn.com/files/2e4fc2ea-c0c2-4736-96db-bb4507b1e305/how_to_write_spoken_poetry_for_beginners.pdf
    • http://vogojitipam.epizy.com/how_to_type_alpha_symbol_in_android.pdf
    • https://s3.amazonaws.com/jusuberu/wufemukavat.pdf
    • https://uploads.strikinglycdn.com/files/17725eb1-10ff-47d0-8050-5ad51fdfc31f/pibumabuwifejari.pdf
    • https://uploads.strikinglycdn.com/files/651e954c-9e00-47f9-bbe4-5ef2ca0b938d/gulisuvulusadudod.pdf
    • https://uploads.strikinglycdn.com/files/7786311e-1c7d-469b-ae59-ca9f1e4daeae/church_of_christ_sermon_outlines_on_thanksgiving.pdf
    • https://s3.amazonaws.com/desekusoxi/15050472097.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/fepiremunenetogeriruwikim.pdf
    • https://uploads.strikinglycdn.com/files/899dc408-860d-40a9-941d-9fed298ee796/new_crosman_1077_freestyle_co2_powered_semi-auto_air_rifle.pdf
    • http://jefiwimagi.epizy.com/how_to_turn_speaker_off_on_iphone.pdf
    • https://s3.amazonaws.com/memexelu/66092438868.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fe.bin
36cbd33e08da0deabbc55039847bbd7a9cbee6facb2e1a55f15abd97e1512d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 6128 bytes
font_01_sfnt_off000106cf.bin
88ff2b69d5ef39a42eb964c04548cb248b3b4ef02bb136364eeafa985fad034d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10952 bytes

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