Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e5db28ee452f0…

MALICIOUS

PDF

72.9 KB Created: 2021-03-27 19:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 80c0cd85181b446c5b1d0285ce88d222 SHA-1: 18e7fec388daafe5c4571889d0dc876a3c4c05fa SHA-256: b62e5db28ee452f05765669ed48b30a107f77100888ef0d80d4ca907736f5089
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/123?utm_term=accredo+prior+authorization+form+xeljanz PDF link annotation
    • http://mosilewuzofivan.iblogger.org/zarulogilan.pdfIn PDF document text
    • http://waystep.site/what_is_the_main_idea_of_green_eggs_and_hamoo15j.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/5d0d9473b8af7ca.pdfIn PDF document text
    • http://playmarket-online.com/how_to_turn_on_a_spa_bathtuba76in.pdfIn PDF document text
    • http://milktree.store/mandala_art_tutorial_free_downloadxz3c6.pdfIn PDF document text
    • http://nesibobivugo.iblogger.org/how_many_calories_are_in_a_hazelnut_iced_coffee_from_dunkin_donuts.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/20ba23cbd.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/7b35df62bcbd294.pdfIn PDF document text
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/b9a9f5e9512.pdfIn PDF document text
    • http://shoop-fp.ru/71964992595m96yb.pdfIn PDF document text
    • https://xowiwive.weebly.com/uploads/1/3/1/3/131398234/tevazobetazilomuto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogamezotuzapop.epizy.com/murabisepekofibegipib.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/84002582646.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/chemical_engineering_thermodynamics.pdfIn PDF document text
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_3c6d4e7278e34a3a90c9f2bdeb9940d2.pdf?index=trueIn PDF document text
    • http://basefub.epizy.com/61789279243.pdfIn PDF document text
    • http://novutizaxerujik.epizy.com/8159584558.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/sub_zero_632_ice_maker_drawer_install.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_34d4f9f99654455095365b21f836bfce.pdf?index=trueIn 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_off0000dee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 5400 bytes
SHA-256: 2f15b88ab93aa40a564a75de7c8f00babb29b93abd0537a2dc22c0e6a7833d1f
font_01_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 11056 bytes
SHA-256: 59a2584ffc502e007ff9efb57081de7206b8a78cfa43336f828ca0b1adc2f38a

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