Malicious PDF — malware analysis report

Static analysis result for SHA-256 9353858a71aba638…

MALICIOUS

PDF

73.7 KB Created: 2021-03-21 05:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 874a3f4bad096ef0da82766a397f1d4d SHA-1: 9ed2c74f945530b774064a3999809a33075c7a02 SHA-256: 9353858a71aba6382c737143d49a58a703fdbae6f431138e92a43b01db6f7d53
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many of which are likely part of a link farm designed to distribute malicious content or phish for credentials. The embedded URLs suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=national+latin+exam+level+3+study+guide
    • https://burodepizojeke.weebly.com/uploads/1/3/2/6/132696233/6b231eb1ea4b8.pdf
    • https://cdn.sqhk.co/nogugojuri/ijejige/launcher_for_android_tablet_free_download.pdf
    • https://cdn.sqhk.co/pofoxubo/2gjb9Rl/pidukepimipewebur.pdf
    • http://dobafeser.66ghz.com/97016454648.pdf
    • https://cdn.sqhk.co/munuluxel/jdQidg6/secret_of_mana_snes_mini_2_player.pdf
    • https://cdn.sqhk.co/golemejexeno/HhfibFp/20855666733.pdf
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/6332114.pdf
    • https://mejofeva.weebly.com/uploads/1/3/2/6/132681501/nefetaz-pukuwonurewape-fadufuxul-digifini.pdf
    • https://cdn.sqhk.co/kebokeregim/cjhgdA8/fifa_world_cup_2019_standings_canada.pdf
    • https://robigatif.weebly.com/uploads/1/3/0/8/130873787/15d0d816.pdf
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/paxiz_zagozudiza_lufap.pdf
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/kitujifiwuwesu.pdf
    • http://nulonelam.66ghz.com/basic_integral_calculus_tutorial.pdf
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/rixivimawowafodaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa3d34bf-5e20-46e5-81b9-ba2bf0e5433a/48784470498.pdf
    • https://s3.amazonaws.com/bulalowisu/ximibizilitadigep.pdf
    • https://uploads.strikinglycdn.com/files/dcd9690e-a0cd-45dd-b705-ba9dfcf58201/gods_way_to_ultimate_health_ebook.pdf
    • http://dorenibe.rf.gd/punadumegijumew.pdf
    • https://s3.amazonaws.com/bokofapig/gta_online_guide_ceo.pdf
    • http://ralenosozizog.epizy.com/xeviruwuvawuwedutisopul.pdf
    • https://uploads.strikinglycdn.com/files/7c58b417-6db9-4762-bfe9-e4d2e718070a/create_your_own_website_uk_free.pdf
    • https://s3.amazonaws.com/diwitapezu/61509917862.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_off0000e071.bin
0acb3c864a0f1fafa924c0c016db47c7aff6f2f06effdd4c0494a6bafc67dff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 5412 bytes
font_01_sfnt_off0000f2e5.bin
0208d8ab80270d488b3a469fc7fbf506b89d29fb774689957edfe39b8d2090fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 10760 bytes

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