Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa16cfc9a72dd14…

MALICIOUS

PDF

101.3 KB Created: 2021-03-06 12:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36771cf1d934b28c4d0ed822eab24485 SHA-1: 674d2c4532248bb48f2754f89b3224b6f5fe2079 SHA-256: 1fa16cfc9a72dd14e47b8d44dc2e7e46ea8e0ea419eaefb7a685a057edfe4df6
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a link farm on disposable hosting, disguised as a 'Sims 3 product key generator'. ML classifiers and ClamAV detections strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, contains metadata related to its creation, which does not alter the malicious nature indicated by the heuristics and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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/award?keyword=sims+3+product+key+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495271/normal_5fd60d126556f.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/2542532.pdfIn PDF document text
    • https://dogusomuribe.weebly.com/uploads/1/3/0/8/130814063/bopawadamaxis_boxilunejikaka.pdfIn PDF document text
    • http://benosetib.iblogger.org/3_examples_of_quadratic_equation_in_standard_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_6039dffe22c02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454179/normal_5fff310222e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fc74c8d996f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_602b752e4f67e.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/runoweroje-fokavefekalixa-wumubijumuf-nuxafefobivugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_602c35ce30ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_60271acf1f1c5.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/zatimatoxaniz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5fce6925265f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/business_proposal_template_for_fast_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efb954c-ff5d-4371-83fd-73ca76407ad9/how_to_be_an_above_average_person.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/business_proposal_format_mail.pdfIn PDF document text
    • http://sulumasofip.epizy.com/make_worksheets_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/quantifiers_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/datasheet_78l05.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a1de59-f4e9-422b-a9f7-174317885fd0/75745073692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52bbfd7-04ac-40a6-bc2d-2a9ce804803c/gipesi.pdfIn PDF document text
    • http://kimatun.epizy.com/tanuzokusopezizutevegav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07a09ec-9662-487b-beb6-7488767a9705/cs_go_survival_knife_fade.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/formal_email_format_o_level.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_off00014efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFB 5792 bytes
SHA-256: f884f8025fdbbc9340c35b2f5c1a932e6b59434a1e47fc24d0171a96038fe5ba
font_01_sfnt_off000162a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162A7 10680 bytes
SHA-256: 7a47c74607b651f9e7bca90276e5e4a30dff3f88b8274a17e301b1483e6afa4c

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