Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85f061fb943b8bd…

MALICIOUS

PDF

74.2 KB Created: 2021-03-14 15:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 94c3ef0ea064070b54d6365b54e2b88c SHA-1: 522c256d318fe3e1e25a3766240d3ff0df47f999 SHA-256: c85f061fb943b8bdb6725fca58fd690084a90c0da2e3d02600d09e37441a87ab
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=angry+assignments+wow+classic PDF link annotation
    • http://pobunav.sportsontheweb.net/funcion_del_aparato_de_golgi.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/windows_active_directory_tutorial.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/kebulaluzoliwew.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/how_to_set_up_mini_smart_socket_alexa.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/22199242618.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/can_you_use_verizon_hotspot_for_home_internet.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/is_the_asus_rt-ac68u_a_modem_router.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/vusojiburobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fevobelijogal/amc_8_honor_roll_of_distinction.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_9f37fb951c4742bbb30a3404ef1c1269.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_8bfbccc1ebbc40e1a14ee5b0cec4204b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/1612326242.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/94018480138.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/arvd_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/gantt_chart_template_spreadsheet.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/memanirekemevesaxeno.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/nrsv_bible_online_free.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_e22146cedd4748af837dc17c559d88ab.pdf?index=trueIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_d94072c23ad84d6ebcb2d73a7097c2cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/95532624631.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/inertially_guided_bomb.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/zezawokex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 5088 bytes
SHA-256: ff6801ff7996fd9cc161fbe79b118efbff518cc0dd28a549388bb0a5fbe204f7
font_01_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 10076 bytes
SHA-256: 3dc4437f3d7c95721d1411139b0f8b840952367291a159754d1198eda4e1c928
font_02_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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