Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc185ae350f83af…

MALICIOUS

PDF

78.0 KB Created: 2021-03-13 15:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e359bc1af71db346647b0d7a49b2c3 SHA-1: 55f71cdfd60cf42fcf311b9d4136e0379b557e0d SHA-256: dcc185ae350f83af49a9618421a51ff3493bced2c2213c165ce4fec430d6d6bf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's content, though heavily obfuscated, appears to be a lure disguised as a road map PDF, likely to facilitate the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://jumiwimov.ru/123?utm_term=western+australia+road+map+pdf
    • http://lestyprin.online/31065172564bqvwt.pdf
    • http://opensoda.pro/how_to_make_multiple_streams_of_incomenteqw.pdf
    • https://nafezukame.weebly.com/uploads/1/3/2/3/132302716/10294.pdf
    • https://pakujefaf.weebly.com/uploads/1/3/0/7/130740244/1216315.pdf
    • http://all-system7.work/buxinufuzibiregodinof6uonn.pdf
    • http://kinoxca.xyz/34191582708o29v.pdf
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/xedetami.pdf
    • https://fixabewol.weebly.com/uploads/1/3/4/7/134711766/rabadomepajozuxale.pdf
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/dikoxalekinusop.pdf
    • http://optamorem.com/automated_payroll_systems0q6b.pdf
    • http://mon-cmbretagne.best/73693452447jmvju.pdf
    • http://govusinixarimi.iblogger.org/lagu_blue_all_right.pdf
    • http://lidzadva.xyz/bad_copy_pro_free_full_versioncbobj.pdf
    • http://otomail.business/nintendo_wifi_connection_error_code_50099xr9g6.pdf
    • http://am-sound.ru/adobe_reader_para_android_apk_uptodownpvpne.pdf
    • https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/985080.pdf
    • http://noxerazomefo.iblogger.org/17442649207.pdf
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/rixulojunogojig.pdf
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/9763dc.pdf
    • http://vzale.ru/55271013903khm7.pdf
    • https://lidowape.weebly.com/uploads/1/3/4/4/134403474/kojor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_bc2e1d7658a44328a05284c351b769d7.pdf?index=true
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_16802a75547d4afd9812d22084a79e7f.pdf?index=true
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_c8582446665849eeae02462ae3e5e0e9.pdf?index=true
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_f1710577649d4d49a0e3861342a587af.pdf?index=true
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_0ff2791831534228bd5243d43004b5ec.pdf?index=true
    • http://disukifas.epizy.com/vejoworez.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93b.bin
190de10b430a2cc091f36dea0c996ec5e411bc487df757046eb3b809dc10d70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 5200 bytes
font_01_sfnt_off0000eade.bin
5ddb74756b81fe4c624a471d94e112d76a5c132d7052ca65580fdaabf3ca04c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 10540 bytes
font_02_sfnt_off00010f2f.bin
93888c35298f29e79e54a6a65cd99b73e2558ba8b34fa4260820e751723bab70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 17676 bytes

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