Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3094885f4cf476…

MALICIOUS

PDF

103.4 KB Created: 2021-03-03 19:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e5a2a96e5d1d5323e583bc8e3883776b SHA-1: 5d8cb91d9b96cbbc5f9acb85aa765e45b3035b9e SHA-256: fe3094885f4cf476c2cf75a23f16cdbcc0a142be758fe4fd83a850fbc93cba34
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to link farms and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though heavily obfuscated, suggests a lure related to 'dimensional analysis worksheet chemistry answers'. The presence of embedded URLs and the ClamAV detection further support its malicious nature, likely serving as a phishing or spam distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=dimensional+analysis+worksheet+chemistry+answers PDF link annotation
    • https://cdn.sqhk.co/ximegawaso/ieeHhih/jixejitewakebet.pdfIn PDF document text
    • http://maxawasoreveta.iblogger.org/dimirog.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/ghabSBW/vegogejekulozakaduwili.pdfIn PDF document text
    • http://jotepuxigavof.iblogger.org/vojazotizowubafetiwe.pdfIn PDF document text
    • http://xilegutopeza.22web.org/star_wars_imperial_handbook_vault.pdfIn PDF document text
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/funowowebubadulu.pdfIn PDF document text
    • https://kivisazof.weebly.com/uploads/1/3/2/6/132696558/gupiwijike-debawaned-tosatulamujebu-zipete.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/wuvesumunufe.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/kagivanolo-robenumo-sozov.pdfIn PDF document text
    • http://fodokimi.22web.org/backuptrans_android_iphone_line_transfer_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/nW2ghiW/wish_me_luck_meaning_in_tamil.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/jalasilunaz/8571462924.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/asus_rt-n12_3_in_1_router_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/gigiliwenerigedugalibaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/lemuzogej.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/41260489920.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/human_anatomy_muscular_system.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/tixatovitifoverop.pdfIn PDF document text
    • http://kipabiz.rf.gd/tesixererunimujep.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/61129795307.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15003 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off000159fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FE 5296 bytes
SHA-256: cf0782f1821790dfd031c6a5fb48a2c6932fbac6f446f40a235fe217b40d2c0f
font_02_sfnt_off00016bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF0 10328 bytes
SHA-256: cc11bc51ff99d8634405a8facc4403f0c3802e323f77dcd41d778d52ca1da9ca

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