Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a90c550ae74f7ee…

MALICIOUS

PDF

75.8 KB Created: 2021-06-01 04:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 031b9313c1a0c95d3b60af0d6fe973b0 SHA-1: b6cc96c9673a77982f12ae58c2e82b0c07320db9 SHA-256: 1a90c550ae74f7ee6f134f24b9bf883e517ea829faa85af70b0cc6fbce98b36d
186 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. It contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The embedded URLs, such as 'https://pixomot.ru/pbw?utm_term=mlb+perfect+inning+2020+mod+apk+unlimited+money', suggest a lure to download potentially malicious content or engage in fraudulent activities. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pixomot.ru/pbw?utm_term=mlb+perfect+inning+2020+mod+apk+unlimited+money PDF link annotation
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/jevevazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_6015ff22e1440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_6068cff6950a6.pdfIn PDF document text
    • https://samibogamo.weebly.com/uploads/1/3/4/8/134883552/wulonaxu-tekuvezu-kovevewuxa.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/rifizewifomovaf-lolinipebaponuf.pdfIn PDF document text
    • https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/639ec0e38ac0820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_6048a0d2191f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/979fd339-8656-4d9d-b3c8-3ebe95853b65/water_droplets_normal_map.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144428121/chase_deposit_slip_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640776af-d42a-4fa9-9cf3-17351095aabf/leo_tolstoy_emperors_three_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8d9d91-aed5-49b6-9cf5-a1817fd5a0f5/96845914774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6604f5-9663-413b-8a1a-7b6498436e2a/how_long_is_a_mini_dv_tape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3ae468-a8ff-4b3c-8e77-6334e1d6414e/how_to_do_the_warrior_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc88b17-61e2-4038-a433-f86ca50d394b/3874724079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ac3288-4bbe-4ba1-bfb0-bc072ab23089/ti_nspire_cx_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f908eb89-54ad-4186-9fc9-a3ef09ff5eeb/how_to_turn_off_wifi_direct_on_samsung_tv.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144420216/cuentos_cortos_de_aventuras_para_nios_de_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae7d223-8873-4a51-a163-ffa5fa4b5919/letter_of_credit_sample_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49e6da3-5275-482b-9338-a063f152345d/37669418748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51bc37d-ed3b-4096-9f2e-f554750601f9/maroo_of_the_winter_caves_full_book.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/how_much_did_the_movie_wonder_woman_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654e4033-5d18-4c63-bf41-4c8e3c1533ad/4702976912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35786644-bfe0-4bbf-9760-0cfe1b08766e/dararolakazutes.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_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 5884 bytes
SHA-256: 7dbae46f7799efacad216ee1955e5d18665c61496467cebc67dd46b38f4da971
font_01_sfnt_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 10892 bytes
SHA-256: 75081ed01588669c5f295aea5916329d0f1e0c5a6e674518695aa94a82099896