Malicious PDF — malware analysis report

Static analysis result for SHA-256 616a32294d566585…

MALICIOUS

PDF

80.7 KB Created: 2021-04-08 17:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a8fb87de689c8daf1c6006b75704e9a3 SHA-1: 671d22cc01b5daf56df17ab2e6998bf0166109c1 SHA-256: 616a32294d5665850416703c6cb983938f65c09eb9e234462c92523afa1740c3
76 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating it is a lure for free downloads and includes a high-risk redirector URL. The ML classifier also flagged this PDF as malicious. The embedded URL, 'https://baarspo.ru/strik?utm_term=how+to+remove+textured+ceiling+uk', is the primary indicator of a malicious redirection attempt, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/strik?utm_term=how+to+remove+textured+ceiling+uk PDF link annotation
    • http://tanivikovome.sportsontheweb.net/10932818178.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ajfkOtP/50290433209.pdfIn PDF document text
    • http://ductsunlimitedins.com/is_selling_real_estate_part_time_worth_itcrwln.pdfIn PDF document text
    • http://lg-copyright.com/kirkland_healthy_weight_dog_food_feeding_guidepuvqm.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/computer_systems_analyst_training.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/lujhhcJ/8010115121.pdfIn PDF document text
    • http://leludezoz.scienceontheweb.net/words_synonyms_and_antonyms_list.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/hZALjbN/mewagapitoferijufu.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/manejo_de_angina_estable.pdfIn PDF document text
    • http://conicppjry.bid/6963307556kfu68.pdfIn PDF document text
    • http://vertitribe.store/modern_world_history_textbook_9th_grade0390a.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/xefezesebusu/privacy_policy_template_australia.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_ae2ec3e8da594b0b8eb9568b93364732.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/gps_garmin_nuvicam_lmthd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415300e8-6368-44e3-aab0-0e1a9d8cff1d/19104111927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025fc2a5-0afb-46f7-b947-1a7136352e54/37053475968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05f3039-f70d-4e8b-b7cd-1e26db73d24e/vejumewudusovavojakizex.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_90ba2452155442f4b4af43a79be740bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/718f13ab-c7d5-403f-9434-c39f9c72b3ff/viviveg.pdfIn PDF document text
    • https://56352102-112a-4456-a677-0775450c4ed3.filesusr.com/ugd/ed4e87_a19934a4d8fc492297a5f4a33bc86927.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/nesed.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/takalokipikan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a113b58-f3ea-492b-a19e-188a58424010/what_age_group_is_heroes_of_olympus.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/who_makes_huskee_mowers.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_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 5116 bytes
SHA-256: 1bb67b761aa5ed52fbb03427d48a9c5a1a52ab1f900f28ac05f11e53ea37a7de
font_01_sfnt_off00010fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 11036 bytes
SHA-256: 82858d6f5fff22c32f16d1cf2d4ea48710e21d957a456ec01bf9a328701ea10f