Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8c44e77992581c…

MALICIOUS

PDF

87.2 KB Created: 2021-03-24 03:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d84e82c205636e22135f16dfdaa494c6 SHA-1: be206d972f3c50e9bd07d7b88fa8703bcf0f361c SHA-256: 1b8c44e77992581c72aa1a1837572313b4fae8beb50623eca80d32a50bacf1d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://fokemale.ru/wix?keyword=mathematics+all+around+5th+edition+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389576/normal_6014d78df17e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_6023fe83a1600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/titugome/nugumazi.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/interior_angle_of_regular_polygon_with_14_sides.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/87095693155.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/nse_stocks_historical_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2cfb40-5164-4107-aa6c-3e286b2f5fa2/road_signs_and_their_meanings_in_uganda.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_c2571093757840cfaa62be7721dae238.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/matlab_plot_line_between_two_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1fcaccf-bc2f-4fa3-8342-bea67e2e3955/why_is_agenda_setting_important_in_public_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/90093829672.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/crazy_house_help_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/amma_endrazhaikkaatha_tamil_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/72412910639.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/25696345389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f25fa54-4105-467c-90e5-83ae9d6f47f9/all_my_sons_moving__storage_of_dallas_llc.pdfIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_1113b40c83c347209399605e013aa73e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/14874401469.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/91167047999.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/cap_guidelines_idsa.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/58695839274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71e4e09-403e-4f5a-93d8-4522c7f63948/samsung_nx3000_manual.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_83c36b71019a4741809e8d43bea87110.pdf?index=trueIn 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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 5524 bytes
SHA-256: f0cd66060e1655dffaf2024e6414dec95e2c59252bf05033f8d9dc553c917dee
font_01_sfnt_off0001263e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263E 11572 bytes
SHA-256: dda499e3375e7912c434cd59c8166a12b981b197b2f838cf8f9fc2afee3b4aa9

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