Malicious PDF — malware analysis report

Static analysis result for SHA-256 5427179b3a01053f…

MALICIOUS

PDF

80.2 KB Created: 2021-04-17 23:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 57cba0c646cb6317c783990fc79262e9 SHA-1: 203f4f0cbb247c0ccb8ac42f3c64cd56261f9fb2 SHA-256: 5427179b3a01053f1447acec87e255496fd058b6b95c6c1f847da1485a517429
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting an attempt to direct users to malicious sites. The document body, though heavily obfuscated, contains text related to 'mathematical functions in excel', likely a lure to disguise the phishing or scam intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=how+to+use+mathematical+functions+in+excel PDF link annotation
    • http://torixobo.mypressonline.com/89282761413.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/dibobirewefoxenupasitiloj.pdfIn PDF document text
    • http://kukogekaw.sportsontheweb.net/adding_subtracting_multiplying_and_dividing_polynomials_worksheet.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/reported_speech_to_direct_speech_online_converter.pdfIn PDF document text
    • http://kinikapiv.22web.org/where_change_transmission_fluid.pdfIn PDF document text
    • http://finonit.mypressonline.com/64395784881.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/morphology_examples.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/should_you_read_the_bible_in_chronological_order.pdfIn PDF document text
    • http://vugijow.iblogger.org/minn_kota_power_drive_ipilot_reviews.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
    • http://wisuvobere.epizy.com/joel_osteen_become_a_better_you_download.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_8cc102a45681465f8972e73fd44498ab.pdf?index=trueIn PDF document text
    • http://wotiputega.epizy.com/addicted_novel_by_zane.pdfIn PDF document text
    • http://kebanibaru.epizy.com/aspiration_pneumonia_therapy_guidelines.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_fab1a82cbf1c44cf9c42187529fbb1bf.pdf?index=trueIn PDF document text
    • http://wupidusujimi.myartsonline.com/35539200846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d10ce4-617e-4308-8f1f-c61892b4bbf0/how_to_unlock_kenmore_elite_dishwasher_model_665.pdfIn PDF document text
    • http://dipijiz.epizy.com/nepofajexowuserumotirom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f67b3a-3a12-4546-9459-a7b3b1e0df5a/can_you_make_money_house_flipping.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/gumega.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 5028 bytes
SHA-256: 3b7acd6ef44b36c91ee30338395d0422f5eeaa4f07fffd1346199cdae3953c55
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 11000 bytes
SHA-256: bbba0d970facb112d29252943e0457edef0c488931c6fb89ffd77e5bc1705b90
font_02_sfnt_off0001257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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