Malicious PDF — malware analysis report

Static analysis result for SHA-256 685818f846818f39…

MALICIOUS

PDF

87.1 KB Created: 2021-03-27 15:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41a89c392cb62a09dc2ebe93121996f4 SHA-1: 2d897a07d8c6560abd0d63c8dbb928e7f51863ef SHA-256: 685818f846818f39cf82a1b271c4abc3253d218abe4efceefbf1b8a55429f25c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure suggest an attempt to exploit users searching for specific content, leading them to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wix?keyword=soul+eater+kishin+awakening
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/4524968.pdf
    • http://zijilip.iblogger.org/pifubijojisomozikolup.pdf
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/mowetiridagi_sipinigegi_tunilawejori_maxozamami.pdf
    • http://natimivenekixu.22web.org/amazon_kindle_fire_hd_10_how_to_use.pdf
    • http://kikebumanexewuj.22web.org/wamabodevakexiduwepivato.pdf
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/zigosupagawubipug.pdf
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/1678477.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_7b22159515d44f059f0d9f3a86831173.pdf?index=true
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_766cb39db8774fe2b3153f084f051d15.pdf?index=true
    • https://s3.amazonaws.com/kozewuposoridil/manual_de_iglesia_adventista_2015.pdf
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_ca93af346c724b44842204ae23d0b9b0.pdf?index=true
    • http://tuvatopuvonu.epizy.com/bleacher_report_man_united_herrera_news.pdf
    • https://s3.amazonaws.com/wolina/administrator_password_recovery_software_free.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/49663993887.pdf
    • http://sewogixura.rf.gd/tobatuzisujifozuzivuwef.pdf
    • https://s3.amazonaws.com/kotenu/tp-link_tl-wa850re_v2_manual.pdf
    • https://s3.amazonaws.com/tutasujal/tutidawusamow.pdf
    • http://kikevanalujik.rf.gd/microsoft_brand_guidelines.pdf
    • http://lexifavigagep.rf.gd/dozazuv.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_7c910d4fac324292882f94fac168d9eb.pdf?index=true
    • http://xupikilagi.rf.gd/pomevej.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22d.bin
4fc8ef5663435c55c71da58763da369eb5a035018591d176b762f3882544db9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 3948 bytes
font_01_sfnt_off00010017.bin
9684434df328a08cdbedc017f110b30a1e24c279db7616837064261b150c2d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 5208 bytes
font_02_sfnt_off000111db.bin
16b0329189c926800793efee73aae9a89691f6259167342a4feac6b8213b88f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 11096 bytes
font_03_sfnt_off0001379b.bin
ca0bb856d51d4c440eb4e48db524e4b4a87bf80294704eab3ae97752e74326e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 16132 bytes

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