Malicious PDF — malware analysis report

Static analysis result for SHA-256 166d2aaa02331155…

MALICIOUS

PDF

80.7 KB Created: 2021-02-20 15:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7ba6096436f628a6003fa38d374d9766 SHA-1: 14b228806494baeb41589b39f93d8a49a71d12ae SHA-256: 166d2aaa0233115549acdef7848f5287cfd7629e8af219af0c322f47b30c8750
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure for a free PDF download, aligning with phishing tactics. The presence of multiple disposable hosting links indicates an attempt to distribute malicious content.

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://bologen.ru/strik?utm_term=ayurvediya+garbh+sanskar+marathi+edition+pdf+free+download PDF link annotation
    • http://good-production9.site/kijedormbq4t.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/nazonokoselafiwero.pdfIn PDF document text
    • http://wiinorama.fun/ouz_atay_eserleriskgun.pdfIn PDF document text
    • http://khanapoorti.com/angular_5_dynamic_template_variable_name7qmoq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_6005b09c1f216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fe38bd5d5225.pdfIn PDF document text
    • http://wiinorama.space/what_is_the_moral_of_beauty_and_the_beastw3m39.pdfIn PDF document text
    • http://morpeoplelife.ru/apunkagames_god_of_warjwck1.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/jiwaz-ragos.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/a33ec.pdfIn PDF document text
    • http://elerctum.org/25267088168axw0p.pdfIn PDF document text
    • http://discount50.pro/automation_testing_tutorial_for_beginnerschdwz.pdfIn PDF document text
    • http://bred-enligne.com/identifying_simple_compound_complex_and_compound_complex_sentences_worksheetavwyt.pdfIn PDF document text
    • http://intekzafast.online/981771073703n1y3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/kuvamemo.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/mass_moment_of_inertia_calculation.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5784 bytes
SHA-256: fa44aabae61bb4f936eb8e03e6a6f2bdb274538505b9c676798160318467d754
font_01_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 14328 bytes
SHA-256: a40d21f05274c9545e9e51d5c9dd6cee42f6c516e75fdeb2c3e6787200ad8dd4
font_02_sfnt_off00011671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11671 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_03_sfnt_off00012472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12472 3552 bytes
SHA-256: 63e75f79c2ee11a4ac4b6de921144d5dfc0f3b439110a8b2f63fca18db0f7d22

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