Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa49aebe326a7c21…

MALICIOUS

PDF

79.0 KB Created: 2020-12-01 18:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e6bfd682be63a13c39303e32f8cd3f41 SHA-1: 534639e78375ba7a240d81aa5094e5d8ff5a476f SHA-256: fa49aebe326a7c21e7db42575a7f4a0c96dc2b481e92c38713532ab1525b2f77
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 0.9998

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://trafficel.ru/123?utm_term=cello+tuning+app+free PDF link annotation
    • https://fexazajix.weebly.com/uploads/1/3/4/6/134669695/nekelozis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc1241ecb3e0f5771784d90/1606493216522/pemozebajab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc3428f6457125654a58914/1606632080350/how_do_paramecium_move_around.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/belt_disc_sander_vs_oscillating_sander.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/51793179150.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ac42a5bc066edfb10807/t/5fc65fa7f81c9a2a0c7dcae0/1606836136854/woodworkers_bench_height.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/xezigeto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc18903173fb5383bdcf5da/1606519044644/55321993200.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62abf8cdb769c6dac31a/1606378156805/forever_doors_owners_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc2dec44e98326c026fd87d/1606606533556/the_ladys_guide_to_petticoats_and_piracy_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bronkiektasis_pada_anak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9a14f98375720a64f80/1606285730111/mudixikefez.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/59513029598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc6584e-3aa1-40c1-8e86-bebc0efc8a41/vixx_shangri_la_concept.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e552ec917750a3d7e003/t/5fc174799ee0f32b878a0a2c/1606513785297/potter_box_case_study.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 4796 bytes
SHA-256: 5060a9600969502c3f46690bf4a0ae92d8193e3355c97157f11bc81ec6317baa
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 10904 bytes
SHA-256: 98626f7b2299c78724ea287c41427882152e4ffb8ca2c46d106c53ae2a438697
font_02_sfnt_off000118cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 16392 bytes
SHA-256: 6a4acb655a93af99c034fefb5cf629d98fc6daa8f4c706f013e0139d3a062ba1

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