Malicious PDF — malware analysis report

Static analysis result for SHA-256 897d8a783a790262…

MALICIOUS

PDF

86.8 KB Created: 2021-02-28 17:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 17c515626e445ffa98ec01fe09e97eac SHA-1: a61cf0a27c59f33ca883eef882290ecbbdce16ff SHA-256: 897d8a783a790262184fce0b9ae6588ef3bf280934c432b3cbfb37bbc5adf9a3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to SEO-optimized PDF files hosted on various platforms. One of the extracted URLs, 'https://jottigo.ru/wix?keyword=moto+mx3+2+unblocked', appears to be a lure for users searching for specific terms, potentially leading to phishing or malware. No scripts were extracted, but the presence of numerous external links points towards a content-driven attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=moto+mx3+2+unblocked PDF link annotation
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/4856705.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/6526463.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/zozalonuwobowekuf.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/9974226.pdfIn PDF document text
    • https://girezerel.weebly.com/uploads/1/3/1/0/131070389/7253256.pdfIn PDF document text
    • https://dodanopo.weebly.com/uploads/1/3/1/4/131408738/a59e93d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_602a8a2318cf4.pdfIn PDF document text
    • https://puritokubopop.weebly.com/uploads/1/3/5/9/135968540/mopigagunoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_600c09dbe49c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_601bbb5f8c41c.pdfIn PDF document text
    • https://juwizezajofop.weebly.com/uploads/1/3/1/6/131637218/ce48ee.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/dusafuxemopubefase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pisidolasij.epizy.com/how_to_update_a20.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/new_ncoer_support_form_character_examples.pdfIn PDF document text
    • http://jipumenovimol.rf.gd/nepozoxorezejikuz.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/8040168110.pdfIn PDF document text
    • http://nixewawomito.epizy.com/how_to_explain_human_trafficking.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/what_does_a_doll_symbolize_in_a_dolls_house.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/maurice_ravel_bolero_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/76121084107.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/33222292440.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 5172 bytes
SHA-256: 7a128c59209df4d5cae7deb6d2656f7701dabba38041489661efc0c21cb86f56
font_01_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 10240 bytes
SHA-256: 77b1d4946ea4a21cd3f080180edf005637b8c982b0ecb76f2a8ef5764b0c6b95
font_02_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 17520 bytes
SHA-256: 9ac501e3b1984a1cc293f8007805a33e86e823781aa4d6d1fc1bb6083c8a9bb7

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