Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa82dfe4e206caa…

MALICIOUS

PDF

342.0 KB Created: 2021-06-04 07:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcee180a62ce47e0d1248befe883ac06 SHA-1: 0aa1735254af293c831ff93dadf9faf453d2c278 SHA-256: dfa82dfe4e206caa76d44f983468c06beec72c84e4f61e854e4687fbc744c44f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. ClamAV detection and ML classification indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to employment contracts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9143

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=variation+of+employment+contract+letter+template PDF link annotation
    • https://xuratofojiwob.weebly.com/uploads/1/3/4/0/134096374/sakikov-sozetuma-kebomikutes.pdfIn PDF document text
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/1640199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_60531b3d4c1c1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4497372/normal_60b0492e11f6d.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/d6d375ceb46.pdfIn PDF document text
    • https://vulajavup.weebly.com/uploads/1/3/4/6/134683256/2651594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_6064764ddf631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_601f9ce1e35ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_6061c2438b930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fe7f7a5aa709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474750/normal_5fe73d4288c9f.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
    • https://uploads.strikinglycdn.com/files/2b1dfd41-ceb8-4cb0-9171-9b0ba5baf73c/how_do_you_set_a_clock_on_a_hamilton_beach_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04639c82-98ab-4a12-a73a-2101094a3ecb/solucionario_qumica_analtica_cuantitativa_day_underwood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507b81e6-0a96-4eee-be6f-677b89b2db1c/nerinakusesexukazemijev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d5d320-6e39-41ad-bf41-cd0c14977afd/does_stretching_help_piriformis_syndrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2069a669-2a01-41dd-aab5-385b545fb973/fidedudugapovebevolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e64965-9399-4503-9b15-a20d91cd6e0a/64282500871.pdfIn PDF document text
    • http://garigor.pbworks.com/f/manual_carburador_solex_34_34.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf822f09-758c-4805-bc60-09a27f7e96fa/vamosamuteke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc64d3d4-4884-4d3c-9925-187c92ab4034/best_3_point_shooters_in_nba_2k20_all_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fcea83-36e2-46c1-88da-6cfc65a5114b/remington_model_700_sps_bolt_action_rifle_6.5_creedmoor_24.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144518424/important_quotes_from_the_count_of_monte_cristo_with_page_numbers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50135 4840 bytes
SHA-256: d9197633c3c1f6f8f3bee9f4af8a4a680e3dd6e8adac732f5a030e51c4fdff28
font_01_sfnt_off0005118d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5118D 11760 bytes
SHA-256: 0cbffd988fc7221ab2d1be2e8140c35671d8e0af5f13a579918a3ef557a0451d
font_02_sfnt_off000538ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538EC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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