Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fa3dbb9811f1e0…

MALICIOUS

PDF

74.3 KB Created: 2021-04-22 11:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c16eec751b5692e52c02f39c9652812 SHA-1: 84f4077b90d2bde6064d4af54b5d2f63c13a840b SHA-256: 73fa3dbb9811f1e0b15e643b416e8dc5418d57b23b0a1608c4494db0fa983665
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV detection and ML classification strongly suggest malicious intent. The document body, though partially corrupted, mentions a topic related to hunger, which is likely a lure to direct users to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=why+does+the+color+red+make+you+hungry
    • https://cdn.sqhk.co/sulugedako/giicghn/61478491301.pdf
    • http://jakebaxujimug.22web.org/words_meaning_in_english_to_urdu.pdf
    • https://cdn-cms.f-static.net/uploads/4450249/normal_60209061aed58.pdf
    • http://vizexibidoxi.getenjoyment.net/learn_python_for_beginners.pdf
    • http://rexonina.medianewsonline.com/41965088726.pdf
    • https://cdn-cms.f-static.net/uploads/4403937/normal_60246d9400b71.pdf
    • https://cdn.sqhk.co/dolavalof/jhhbidw/21029147894.pdf
    • https://cdn.sqhk.co/fefamuve/oiccUII/turbo_league_mod_apk_2._2_download.pdf
    • http://logawedulukudan.mywebcommunity.org/baby_shoe_pattern_free.pdf
    • https://cdn.sqhk.co/lepavenujal/72ighj4/gesebexafosudeju.pdf
    • https://cdn.sqhk.co/wibetaxor/cn7dkjE/45387656243.pdf
    • https://cdn.sqhk.co/tememagitapo/igigAhd/fitbit_charge_3_replacement_bands_best_buy.pdf
    • https://static.s123-cdn-static.com/uploads/4403946/normal_6000a1f7bcc8b.pdf
    • http://rofogukiluvupu.mygamesonline.org/cutting_edge_intermediate_3rd_edition_workbook.pdf
    • https://cdn-cms.f-static.net/uploads/4465151/normal_6031819b810cd.pdf
    • https://cdn.sqhk.co/xafemepino/jcjcV6V/14606170753.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_974f59149bf848b992b905a5871acf9c.pdf?index=true
    • http://kukejisagev.epizy.com/97509165720.pdf
    • http://zudupaxub.myartsonline.com/panasonic_arc4_es8243aa_review.pdf
    • http://lasiliroba.epizy.com/how_to_make_a_half_life_equation.pdf
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_904cab5411884003a60a03f08a39fda3.pdf?index=true
    • http://surifetopene.epizy.com/perched_water_table.pdf
    • http://bamemuwibe.epizy.com/blogger_template_creator_software_free.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_off0000e450.bin
7b19891554e76fb7594f0945e1fe7c43e4990b3b26664698f94d8fee206a3525		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 5532 bytes
font_01_sfnt_off0000f70b.bin
974d7fbe96e086c2442c799f9db824b7b50620ed91a23baacd06a0d635d4ad3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 11172 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.