Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a311f88872a3434…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 13:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3d4fbb6300ed07af722861600d2b73e SHA-1: 675922abc84db3bd42be531812bbfa36e078919b SHA-256: 8a311f88872a343476f95afc45e061233ebd89f6e3014b6cffd55d3f0b92b5c9
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which appear to be part of a link farm designed to manipulate search engine results. One prominent external URI, 'https://kuzutuzo.ru/strik?utm_term=32+inch+smart+tv+with+built+in+dvd+player+best+price', suggests a lure related to product searches, likely leading to a phishing or malware distribution site. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/strik?utm_term=32+inch+smart+tv+with+built+in+dvd+player+best+price
    • https://xukonixivuki.weebly.com/uploads/1/3/0/9/130969652/xiparaf.pdf
    • https://femuxejafedanib.weebly.com/uploads/1/3/2/7/132740958/netejojinax.pdf
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/d894b1ccb658a08.pdf
    • https://static.s123-cdn-static.com/uploads/4459318/normal_60004b579376b.pdf
    • https://toguxoboribad.weebly.com/uploads/1/3/4/8/134876345/8479054.pdf
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5ffb6991b2cd4.pdf
    • https://rarejitidod.weebly.com/uploads/1/3/5/9/135993923/riximo.pdf
    • https://kujugozu.weebly.com/uploads/1/3/4/6/134660126/89816.pdf
    • https://godosofebi.weebly.com/uploads/1/3/4/6/134651625/851ad485a6faded.pdf
    • https://rapowude.weebly.com/uploads/1/3/1/4/131454581/zuzozuzoxulavebidefi.pdf
    • https://nalufubuxozukex.weebly.com/uploads/1/3/4/4/134479837/416075.pdf
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/2351175.pdf
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/7988279.pdf
    • https://cdn-cms.f-static.net/uploads/4501961/normal_6040196e55488.pdf
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/520bf42d5c6e38.pdf
    • https://mekuzawejonoma.weebly.com/uploads/1/3/1/6/131606345/fuwinujufomogar.pdf
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/zigunivuxexu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d2f819b9-fb37-488b-a98a-6add8627d1d4/which_lollies_are_gluten_free.pdf
    • https://uploads.strikinglycdn.com/files/184eb42f-f897-4a7f-9f6b-c096723a93d4/17_indisputable_laws_of_teamwork_ppt.pdf
    • https://uploads.strikinglycdn.com/files/cbfb10f8-0e06-4f4a-b6d0-f969338b1c41/fedex_tracking_by_email_address.pdf
    • https://s3.amazonaws.com/kakef/20498807193.pdf
    • https://s3.amazonaws.com/dejazuvorira/28176000449.pdf
    • https://s3.amazonaws.com/xebuvuwov/videoder_2018_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/b4a68397-c8ef-47dc-a468-dcb50bfaa392/polisim.pdf
    • https://s3.amazonaws.com/wixatax/waterbirth_island_dagannoth_slayer_guide.pdf
    • https://uploads.strikinglycdn.com/files/9040178f-a479-43ce-a652-93e19269999e/jokiveboximuwugubol.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_off0000e9ff.bin
7062d0ed845ec1087bff8ba3f47b275fa085f987e20b2f4a571b52a2c48e3d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 5908 bytes
font_01_sfnt_off0000fdfc.bin
0329095905850aa30bb6435d50041f9422dd6bf08d967b4ef055ac5730ed159f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 10772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.