Malicious PDF — malware analysis report

Static analysis result for SHA-256 348171860a750e49…

MALICIOUS

PDF

78.0 KB Created: 2021-04-10 00:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d7815b92f8374476a42e48d2a5b6207f SHA-1: d9439ba89cd05d4665127a237aedecf8cf9c2c4b SHA-256: 348171860a750e491c8decca1c115373ff9289387a299161858c5ae0ee8e2820
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the embedded URLs, https://mezovuduw.ru/strik, is flagged as suspicious and likely leads to malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=salem%2527s+lot+2004+imdb PDF link annotation
    • http://shoop-fo.ru/xbox_one_controller_keeps_disconnecting_pc_reddit04fmc.pdfIn PDF document text
    • http://shimano-stradic.ru/vedolowigitezxcm2.pdfIn PDF document text
    • http://sun-italy.space/simple_present_exercises_for_beginnersav6j3.pdfIn PDF document text
    • http://arboozfilm.com/pivedod68638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fd610a03efa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_60254d149b506.pdfIn PDF document text
    • http://christinaanddavid2019.com/gifted_hands_movie_free_downloadgc6x4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483088/normal_6024685172f5a.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/lekizamuzavidyzype.pdfIn PDF document text
    • http://yesnutural.space/dutekamuxukavmgpif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/86295985193.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/mosukejaxavivewawinule.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/zugazalebakatavujunajo.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/89107008356.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/salezokamanagudukowu.pdfIn PDF document text
    • https://063758de-fb2f-4258-809e-b727485bfd5a.filesusr.com/ugd/89cda4_f3b007ab1c4f4c749e38a40813b12c0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/daduruxowoxodanudumevi.pdfIn PDF document text
    • https://b36ad067-21ef-4b17-9055-1dfcbb3fb98c.filesusr.com/ugd/8673ad_9ae7404945c74b10a67fece545b087df.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_94d530d6922c4e8797fa7c09d323ae07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/80311507453.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/19553207664.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 5516 bytes
SHA-256: 993063df81849ec96f024c45035d2a3d4f157f919161d24a58a2b140c92c7b36
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 11896 bytes
SHA-256: 74715a3033b57c3b66a358a1afc8d48ccfca96f5a3c51f4d8648150f0db1a49b

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