Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bbe03e01b4a1e7…

MALICIOUS

PDF

89.8 KB Created: 2021-05-17 10:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8ed201a8b800e7918d0b807c852a8e21 SHA-1: 0df234d80c168db37672e145a0598b1e72fc376e SHA-256: 09bbe03e01b4a1e726c778212b3834ec409a2497feb71803a3d86d220ca3750d
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, many hosted on disposable domains, under the guise of a product manual. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=manual+cafetera+cuisinart+dcc-1200 PDF link annotation
    • https://cdn.sqhk.co/mekekomubun/eigjgjc/37572746593.pdfIn PDF document text
    • http://dojimifarekajiw.iblogger.org/11179484520.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/iBLibjb/ludus_gladiator_school_mod_apk.pdfIn PDF document text
    • http://warokibujiz.getenjoyment.net/past_simple_present_perfect_exercises_macmillan.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/56858645015.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/ygg06je/fallout_shelter_repair_mr_handy_from_wasteland.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_5fdc32e29a1f6.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/jfN7gfv/hero_tycoon_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/hhdjct4/vidofimitatanevuxevobifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_60354c12d5551.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/9c947877-61f5-4e38-9cbe-b2afeefb079a/90710417361.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/kilidikufigus.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/nys_pistol_permit_renewal_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d6552e-0ebf-4773-a48b-a843658d32c0/63506764421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c1e759-0596-4647-86e0-7285e8828db1/how_to_drain_power_steering_fluid_honda_civic.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/jupedopog.pdfIn PDF document text
    • http://lanogiwelo.rf.gd/business_development_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbf3282-c653-465a-ba70-598f221b1031/wutikoradepuwadabaki.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/hello_neighbor_parent_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5eaace-86be-44e6-a8fc-283a6eeabc9f/how_hard_is_the_cpc_exam_2020.pdfIn PDF document text
    • http://vumopigaw.epizy.com/fahrenheit_451_study_guide_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/vozatuduliv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 5148 bytes
SHA-256: 723820f45884a2e776c077422c437ead8a7d104b2464fb87928a77d346bc3b23
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 12900 bytes
SHA-256: 8cb5cfee379d3a24ac58a8df730c6584e5457642a5e1cc4023ec2af847a0a059
font_02_sfnt_off0001344f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344F 16088 bytes
SHA-256: a1804fab7033f1d251fb29e732c1b9641fb316f4dad76a6f11c561d626689051
font_03_sfnt_off0001490e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1490E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3