Malicious PDF — malware analysis report

Static analysis result for SHA-256 a779a24092efd96a…

MALICIOUS

PDF

90.3 KB Created: 2021-05-22 20:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8279f4360aa650b4ce16c1eba10bb19a SHA-1: e3becc7e8aff415b6a1767adf2b08bd4672a7350 SHA-256: a779a24092efd96a9f1063f6e18feae7ca9f9533d87ffbcda7d6a897b58ad958
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to malicious websites. The primary URL, 'https://druttle.ru/strik?utm_term=what+relationship+is+my+dad%2527s+cousin+to+me', appears to be a lure to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/strik?utm_term=what+relationship+is+my+dad%2527s+cousin+to+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393346/normal_601ae2dd0dbf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_6063dcf51a73c.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/995ee01d5e7.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/8964447a.pdfIn PDF document text
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/pefowewilapeme.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/pidiwaxem_mimapudobam.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/8e2c37ae-cbb1-441f-b93a-411e820a1c23/povotaguwobiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1604c99b-864b-403d-993f-218a5e716b8c/xusofefofenasena.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/agropecuaria_de_guissona_s._c._l_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/vibrate_when_call_is_answered_samsung_a20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3410eb54-a254-445d-b0bf-4e0737ecc5be/regojivaxabakevebaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e55a9a9-2059-4ea7-93e8-f0eaee80609a/mugalex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3d77c5-3083-4828-96bc-94a3e2ab4cfc/honeywell_6000_thermostat_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf928b1e-da98-4056-a75a-a607156d5e67/what_is_the_order_of_the_darkest_minds_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96979729-4cad-4706-9182-30166e941ca1/safe_haven_baby_box_in_indiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44db088f-32dc-4595-9b90-01209428eafe/87031224697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e9be4e-2301-47b9-bcc7-4dfed46c3206/craftsman_yt_3000_battery_voltage.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/what_is_heritage_and_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/officejet_pro_8600_premium_e-all-in-one.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_off00011063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 5344 bytes
SHA-256: 93afa130d0224d111853320dae425591e0a35109c5954961ca527258508b16d8
font_01_sfnt_off00012271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 12284 bytes
SHA-256: 4580b193239dc090221311fa03b1d62b52515ac87bdd6f8d08a7e91be85c6af1
font_02_sfnt_off00014bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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