Malicious PDF — malware analysis report

Static analysis result for SHA-256 023f743643868357…

MALICIOUS

PDF

111.1 KB Created: 2021-04-07 08:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3074c90722340e387ad7fffc908466e6 SHA-1: 5bdd9749a545e52c5d11dc0537825e21d430af0a SHA-256: 023f74364386835746428d8588dcba50a7b16a148ca803995dc84790b012946b
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 0.9999

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://lozipotod.ru/wix?keyword=chapter+20+study+guide+electrochemistry PDF link annotation
    • http://drilltech.info/highway_capacity_manual_2010_downloadzbmyi.pdfIn PDF document text
    • http://xrootunited.com/mukisomoa6qv.pdfIn PDF document text
    • http://carbackseat.site/coleman_hot_tub_owners_manual769x6.pdfIn PDF document text
    • http://avit0.cc/76509947752y1i54.pdfIn PDF document text
    • http://goodxday.xyz/fenix_2_for_twitter_2.9_8_apk_2.15.334cig.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liwafo/work_contract_document_template.pdfIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_a67063cf6610437a928e7c9674af7e8a.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_6669ea7883564952a3075851b9f44759.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/atif_aslam_dil_diyan_gallan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/circuit_maker_tutorial.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_63c01b0bb00f46228c8776707b0aaafa.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_ce129e24d2fe479e9abdf5ad1771a082.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wejuvono/86810783174.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/marksheet_loan_customer_care_number.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_074e759ce3e14b03ae4cf9a8684ae426.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/61214534410.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_5595abfd80fa4458b4babb8468bbc38b.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_631957d41be748edad4a4389de5f9f9b.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_6df9c9d102ff415da0d86cf2ca32e822.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/tadavavexezenuwelem.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEB 1756 bytes
SHA-256: 39b3a1b4ee5f3483021c4cdeff8f07230cae5015febc6805ac513fd9777045c1
font_01_sfnt_off00016796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16796 5768 bytes
SHA-256: a9f3c4de39743cf32f0db7a78af345302c626e4a87a4140fd283e773a6c6fde2
font_02_sfnt_off00017add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ADD 1188 bytes
SHA-256: d3d231495597af5711920d393cff225ac786ee6cbe8e23216d4c3e2b5c9499f8
font_03_sfnt_off000181b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181B2 12660 bytes
SHA-256: f173df683fe259d7acf203dcaf3c5d84da5ba81fdb899ed4c2b6f14822c65c6d

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