Malicious PDF — malware analysis report

Static analysis result for SHA-256 867dbbef11c3756c…

MALICIOUS

PDF

77.5 KB Created: 2021-03-21 04:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2793520c8c13f4a1bd3c0f59b471c67a SHA-1: 509b31c9af89ccaf48e42b05445113dee2ee9e36 SHA-256: 867dbbef11c3756c4e259413e9c72e3271ac07bcb368c29dd9668db5f587a8f4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are discernible. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=let%2527s+explore+diabetes+with+owls+chapters
    • https://cdn-cms.f-static.net/uploads/4425919/normal_605479afe2f78.pdf
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/wedufik_xemobezafelupir.pdf
    • https://cdn-cms.f-static.net/uploads/4369660/normal_6011832e9019e.pdf
    • http://lorenbayi.com/83199576773kv1g1.pdf
    • https://cdn-cms.f-static.net/uploads/4470841/normal_60184e92ede00.pdf
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/sepupisawotoroj-wenizoginomob.pdf
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/xuluraded_mevezakuvo_bopesakitis.pdf
    • http://itanah.space/sabarawevumez464m5.pdf
    • http://filozajerezabi.getenjoyment.net/59373611967.pdf
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/texovuneganivaxubujo.pdf
    • https://jamoxumo.weebly.com/uploads/1/3/1/4/131438684/2c4f6.pdf
    • https://cdn-cms.f-static.net/uploads/4490128/normal_604159040367a.pdf
    • https://static.s123-cdn-static.com/uploads/4494160/normal_5fcea15070c12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiloradakuno.onlinewebshop.net/which_book_is_best_for_civil_engineering.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_88fa33c35f9e45ada0a4b4a688794cb9.pdf?index=true
    • https://s3.amazonaws.com/zodererezuzuxi/kuzokule.pdf
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_42446d9e68d1434092576fca62fec6f9.pdf?index=true
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_cea6f19dd0344c20ac93faf960b51ea8.pdf?index=true
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_7219e9c479fc4e66866e9ea38c72508e.pdf?index=true
    • https://s3.amazonaws.com/wixamupelinere/acceptance_speech_2._0.pdf
    • https://s3.amazonaws.com/vufupu/g_shock_ga100.pdf
    • https://s3.amazonaws.com/kakef/54688283036.pdf
    • https://s3.amazonaws.com/dibedamoka/34740187911.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f077.bin
50bc16645e40664e786264448ade98de5d96bb2ec246ff7dd1f55ae7260eec84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 5436 bytes
font_01_sfnt_off00010306.bin
608cd315920c2273bf8980f5b3445600bf7aae3d93bfc79f0038e689247bced6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 10996 bytes

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