Malicious PDF — malware analysis report

Static analysis result for SHA-256 669880cdd32667ed…

MALICIOUS

PDF

72.3 KB Created: 2021-04-16 20:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66fd296a866b34ec56848f1697125f79 SHA-1: db0917ffd78079a5e30def1e7f754954e435c087 SHA-256: 669880cdd32667ed410d4343bbc2aa5ddb6f8d783e53af770954fcd3859bef55
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 0.9998

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://leonvi.ru/strik?utm_term=how+to+set+adt+security+system PDF link annotation
    • http://purpless.vip/ariens_st824_spark_plug0rqpf.pdfIn PDF document text
    • http://plusstore.pro/duxalitile2vgwt.pdfIn PDF document text
    • http://mydenverneighborhoods.com/human_warfare_recordso38h2.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/sebubezo.pdfIn PDF document text
    • http://mynasert.online/80625764598gsjq1.pdfIn PDF document text
    • http://thiswaytovogue.com/dragons_rise_of_berk_pcq7j5h.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/vixeb-lamojosex-vipulozok-nejofatukutaj.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/sotemasokidedufezezibo3.pdfIn PDF document text
    • http://arbitestpark.xyz/navy_seals_movie_music88dw6.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/fekazudabo/how_long_does_it_take_to_heat_up_baked_ziti.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/35884555090.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/pubg_mobile_specification_requirements_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/how_to_check_serial_number_of_hp_laptop_in_command_prompt.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_e55afdcc7c4c44ecbfabba671eb37314.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lukepepe/58198483778.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/popowatekexuwes.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_ba5b7eacddc34d8eb8e90a0ed55973b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/sewawe.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_off0000d14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 4984 bytes
SHA-256: 5dc08ee461c88b4d1588f343824badd2a2506b710c4bc451e6e8461e9733143a
font_01_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 10412 bytes
SHA-256: 0be5a76bac4dad068416a14107c2d07216829ad49bef849df779c5f9b6af29ca
font_02_sfnt_off000105fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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