Malicious PDF — malware analysis report

Static analysis result for SHA-256 5014a158f27d557d…

MALICIOUS

PDF

96.6 KB Created: 2021-03-14 01:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 292e69e01b8f54b296f8098a5310c491 SHA-1: a19c417f4a735418f668c8212521eb9696ff7bd7 SHA-256: 5014a158f27d557d4a015f034e13eb97bdbc71f115aac19488b589d320a81a48
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to educational materials, which is likely a pretext to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/strik?utm_term=ncert+maths+book+class+8+pdf+in+hindi PDF link annotation
    • https://cdn.sqhk.co/texirova/eLhjVhc/dunk_lords_achievements.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/how_much_do_reiki_practitioners_make_canada.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/how_to_simplify_expressions_with_fractions_and_negative_exponents.pdfIn PDF document text
    • http://digogipexoluku.iblogger.org/what_is_the_meaning_of_trade_and_commerce.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/mokisidodepiniziboxib.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/10290553595c578g.pdfIn PDF document text
    • https://cdn.sqhk.co/xixewebirike/mhuhg1X/masterpiece_barber_shop_lake_mead.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/volej.pdfIn PDF document text
    • http://kisiguvawatabom.22web.org/barisal_university_admission_2019-_20.pdfIn PDF document text
    • http://getsalon.xyz/13414824543p3o6n.pdfIn PDF document text
    • http://storefromit.pro/destiny_2_sunbreaker_buildtieqi.pdfIn PDF document text
    • http://world-wild-shop.com/former_bookbinders_philadelphia6651u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/aggiornamento_android_10_xiaomi_mi_a2.pdfIn PDF document text
    • http://fegelefuxenitud.rf.gd/9106475965.pdfIn PDF document text
    • http://wewejozajukenat.rf.gd/dadekamofetofu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/parrot_beak_deformity.pdfIn PDF document text
    • http://sivokag.epizy.com/can_humans_live_longer.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/29084001090.pdfIn PDF document text
    • http://tudaket.epizy.com/92774341832.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/redexumozedamanazasado.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/palaxeziretusilug.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/should_i_buy_a_refurbished_ipad_mini.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 5760 bytes
SHA-256: 97bb037c3a51cde7f114045b49723a6d125ea292669fe204f889a1f8e175bad0
font_01_sfnt_off0001162c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162C 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 11128 bytes
SHA-256: 1be4d5c4b947c3c4c47024f6db9aa7c1913832dcd37e80ab25939a15644ee9d1
font_03_sfnt_off00014779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14779 14840 bytes
SHA-256: 38985a8a7058fe2923ece896e68672ce8832f250d9efe84c4c70eb38496e301b

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