Malicious PDF — malware analysis report

Static analysis result for SHA-256 078ff2f9c41bb1e2…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 13:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d1ac08ecaadfaae66205c0d808a910b SHA-1: 54c2e9bd37b16a772049337334abcda4f7fa1c97 SHA-256: 078ff2f9c41bb1e227aa4c1976ea4c6db296dabe55d435f5c3e403751fe303f5
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 0.9995

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://kuzutuzo.ru/123?utm_term=beats+wireless+earphones+user+guide PDF link annotation
    • https://cdn.sqhk.co/gijesali/czp5Ujd/dumigimerodosup.pdfIn PDF document text
    • https://cdn.sqhk.co/todipageb/thdhihg/pin_quest_pinball.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/jf9giLb/doramodolabegifitaxak.pdfIn PDF document text
    • https://vufavinit.weebly.com/uploads/1/3/4/6/134649981/welidasigipi.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/74a8ad1e409.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/dojivewobasuval/short_biographies_for_middle_school.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_f3634a59cf9e4ea5832e12518dd150ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/72654975450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb55f9-8cb5-494f-91c5-e12ad5268e22/34213073790.pdfIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_4236c65db584434abefeba9726010f83.pdf?index=trueIn PDF document text
    • https://0315d410-4255-45a3-9477-873949dd02ac.filesusr.com/ugd/f85006_02a63944719140cfb96b67219ff0d1c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce3ad0e-37ad-49ef-bcf2-f0d9f6d9b719/75971796544.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/zosaziligapozilirom.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/ccsa_certification_study_guide.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_58ae6a2b9935406cb9d2c9972d333c9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/free_vpn_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/80320687413.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/30191283650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ed0f97-e885-4419-b2a9-054263bfab3d/wordpress_plugins_folder_permissions.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/whatsapp_plus_abo_sadam_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa6c0b1-ac38-4a84-873a-d252ca07e844/91768773638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5753e0-015a-4af9-a65d-b9e42e815091/97984795379.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_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 5360 bytes
SHA-256: 6585fe7474a998587e508706d85adf11aed595729f2bc2c75af75265661a6aee
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 10180 bytes
SHA-256: 2e3625a55e06d5c886ee38d25f671c36940ee216c4994e4dfe28196b215fcf69
font_02_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 16320 bytes
SHA-256: 9bc067c10788671d1e0afdf1535775efc7165495554c24df301a21a6014306ef

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