Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a68d49884aa9e6e…

MALICIOUS

PDF

187.7 KB Created: 2021-04-02 14:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64de40b005d7d2f9dfca41cc282ac1f SHA-1: 818078e3c320f49ff4e59f672abfc9d5494c24d5 SHA-256: 6a68d49884aa9e6e47b7b2cca5722e35e90c5fbcd345980caff96fac2febce8e
96 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 an embedded URL, https://jottigo.ru/wix?keyword=the+scarlet+letter+answers+quizlet, which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious indicator is the embedded URL and the high confidence detection scores.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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://jottigo.ru/wix?keyword=the+scarlet+letter+answers+quizlet
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5fcf775fe07af.pdf
    • http://xazoxewimimo.iblogger.org/increase_self_esteem.pdf
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/gawekadodovi-xotogusiz-gakovowozup-kamidetu.pdf
    • http://naturalik.fun/25792830848nn4jb.pdf
    • http://salonop.xyz/xazilewozanuvefaxeos2.pdf
    • http://shoppingyxplus.xyz/xetixpwlox.pdf
    • https://kijiwutexaji.weebly.com/uploads/1/3/4/6/134698992/7402088.pdf
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5fc883a764fe0.pdf
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/fepatevisono.pdf
    • http://vitrinachel.ru/32030876739qdcqs.pdf
    • https://kiwosadil.weebly.com/uploads/1/3/5/3/135384828/natetobizesuk.pdf
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5ff06db260aaf.pdf
    • https://cdn-cms.f-static.net/uploads/4366015/normal_604892b1a0753.pdf
    • https://vanosejifewufe.weebly.com/uploads/1/3/0/8/130814052/37025e.pdf
    • https://cdn-cms.f-static.net/uploads/4367289/normal_600ad823b3989.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41a39290-08f3-4efa-b701-022379740d75/tokyo_ghoul_re_anime_plot.pdf
    • https://uploads.strikinglycdn.com/files/6f3496cf-e8d8-4980-952a-1446eb551bbc/yamaha_ef3000iseb_generator_specs.pdf
    • http://pegafiloxor.epizy.com/regugolonezujoze.pdf
    • https://uploads.strikinglycdn.com/files/fce90aa7-8f39-42a3-8a63-1f2ae60f54b0/2010_malibu_wont_start.pdf
    • http://jofesosozofoso.epizy.com/hold_the_line_toto_piano_sheet_music.pdf
    • http://tujefozumuresul.epizy.com/doxurugapepaluzefi.pdf
    • https://uploads.strikinglycdn.com/files/0d26fad3-9794-4ebc-998e-7422aa7c9c6f/keurig_2.0_single_serve_coffee_maker_with_4_cup_carafe.pdf
    • http://fefadazagiwafuz.rf.gd/bharathiyar_kavithaigal_download.pdf
    • http://girinuluzu.rf.gd/vutikigorasugodidisek.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_off0002a4fd.bin
31405ab3c2f113f8870abfe656c17d80129c899bd825cfe3d9007717dfc8423a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4FD 5104 bytes
font_01_sfnt_off0002b672.bin
e3ef5196ce593a426258be96277ac6b32a182c25a5a9679fd967d42fcd51bac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B672 12320 bytes

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