Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b38a88ea5f6b4b…

MALICIOUS

PDF

120.1 KB Created: 2021-03-09 10:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 275e9eae9aceae37a95f264203aa00b3 SHA-1: d6aa2c0c72daa2d03bc12db53afa907b3c1bcdef SHA-256: a9b38a88ea5f6b4b8f1d69f7f404cc60a6e6e9cc397b4b11854c45466db5ff2f
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, with one prominent URL leading to a site that appears to be a link farm. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=i+wish+i+were+a+butterfly+by+james+howe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402720/normal_603eaeafb5208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_60396ab85aba3.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/ryobi_battery_charger_walmart.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/epson_xp_424_ink_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/7iagcdv/82820514900.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/mary_poppins_cast_2019_imdb.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/77655445783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_602aab0bbd533.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/iccvgft/nail_salon_near_me_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_6029789b840ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_602ef3669e84b.pdfIn PDF document text
    • http://duwunil.22web.org/sennheiser_rs120_on-ear_wireless_rf_headphones_with_charging_cradle_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/BWJ6gf6/27898332815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5ff56973c8841.pdfIn PDF document text
    • https://cdn.sqhk.co/pomisiforuko/aiiiiZc/85101846136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fd078fa73421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifonuva.epizy.com/indivisible_characters_guide.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/jebazimivuju.pdfIn PDF document text
    • http://numebazo.rf.gd/whatsapp_status_speichern_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/67339217856.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/how_to_get_50_shades_of_grey_on_netflix.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/char_broil_infrared_grill_ribs_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/golanowitajuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/bacillus_licheniformis_agriculture.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D13 5352 bytes
SHA-256: c926c624353be8ae3b1b11d5723d7e1798586131e8f5039135abb5bc9ed50513
font_01_sfnt_off0001af37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF37 10240 bytes
SHA-256: 7ae25f6a4287a77f9296afa7669975559cfdfe8ed8919308d7cb6492e5d23c47

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