Malicious PDF — malware analysis report

Static analysis result for SHA-256 818e3fd5b16ef84d…

MALICIOUS

PDF

80.4 KB Created: 2022-05-29 12:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 5b368e977bc395494cb4284a014443c0 SHA-1: 719a2b05582dd2a73728fb2feccd1e0857fb7b8e SHA-256: 818e3fd5b16ef84d8f53574681cd3e4c524926a96c984a54904bb3dadf4e49c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The sample is a PDF file flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, with one suspicious URL pointing to 'lovig.co.za'. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm or distribution mechanism. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lovig.co.za/YmrXLWy8?keyword=manual%20de%20imagen%20corporativa%20ejemplos%20con%20de%20y%20de
    • https://mazijemolere.weebly.com/uploads/1/4/1/3/141345869/pewajadu.pdf
    • https://sewemojokevapu.weebly.com/uploads/1/3/4/4/134463988/8787070.pdf
    • https://sofasiwo.weebly.com/uploads/1/3/4/3/134319993/vabujaxosasirasubino.pdf
    • https://mudekireziwafa.weebly.com/uploads/1/3/4/7/134730614/wapaxedobebixo-sizefiralodal-dimali-poriti.pdf
    • http://ilovestory.com/upload/file/mexakoxonekekibebaneg.pdf
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/bukigel.pdf
    • https://sakidadofedoza.weebly.com/uploads/1/3/4/7/134762178/1508873.pdf
    • https://jawojugikowaso.weebly.com/uploads/1/4/1/7/141748179/volaranowuxibijo.pdf
    • https://niruzezigup.weebly.com/uploads/1/3/4/8/134889773/kebozupejural_geliropomi_jetuj.pdf
    • https://tawimelobiso.weebly.com/uploads/1/4/1/4/141493856/7756912.pdf
    • http://fuzoku-pt.com/ups/files/files/genemigabarowir.pdf
    • http://soles2walk.cz/data/file/tusolokexusaxi.pdf
    • https://wusagoji.weebly.com/uploads/1/4/1/6/141693943/8694910.pdf
    • https://potuvomominoneb.weebly.com/uploads/1/3/2/6/132683031/kutidukivoso-lenipeb-rasojuwubole.pdf
    • http://juha.be/admin/kcfinder/upload/files/gizabatisito.pdf
    • https://bavodujamula.weebly.com/uploads/1/3/4/8/134855902/1562911.pdf
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/9448651.pdf
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/lokitawiku_pulatazidasurat_fixiwegem.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1628578bc884f1---tobekave.pdf
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/zivagajevoxom-xagasofudaki-xofira.pdf
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/javopew.pdf
    • https://processwork.archerhuang.com/ConImg/files/18828049159.pdf
    • https://queeneskuvo.hu/adminfiles/files/nesixijujami.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf74.bin
be432a3c896ffb2c1a3cc26c43998e96026c5852a06ba3e0fcef9493ec26c179
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF74 11260 bytes
font_01_sfnt_off0000e998.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 16792 bytes
font_02_sfnt_off000101aa.bin
e1b6bbadd4459888ec2118100fa2b31731f1a1186a81342dbe344a5e794b5cb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 18816 bytes