Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82c821bb362e6a3…

MALICIOUS

PDF

90.7 KB Created: 2021-04-19 14:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0212eba59ec422ddf60d5700ccedbab6 SHA-1: 7d1c218988c41f89c08194698b330bb57b4e41aa SHA-256: d82c821bb362e6a33a13c7b519ce4dd4b038c3cfd790d54753f6902b562d50f4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO poisoning or phishing. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=does+the+sandisk+clip+sport+go+have+bluetooth, which likely serves as a redirector to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=does+the+sandisk+clip+sport+go+have+bluetooth PDF link annotation
    • https://cdn.sqhk.co/baluwofuk/yjaiihj/bingo_card_template_excel.pdfIn PDF document text
    • https://gepadagonuvo.weebly.com/uploads/1/3/0/7/130775626/larosifusaradar.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/dd61c9d3365.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/gdibjcA/realme_2_border_light_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/idXdieX/19877051750.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/burojibetowuvadit.pdfIn PDF document text
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/xoberogumilige-raduvedoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/jb49byB/wilmington_ohio_tractor_pull_2020.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/1f8529b4-1811-46da-9f28-84b7b3918b77/how_do_i_get_a_religious_exemption_for_vaccines_in_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/how_to_reset_prius_c_maintenance_light_2013.pdfIn PDF document text
    • http://bewaxupu.rf.gd/1658150938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c00c173-532e-4098-a6c7-319518dcc316/kavinufosudozix.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/critical_kush_yield_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/vomogunubukenepug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2870cb-442f-467f-9999-c846f8cf8ef2/repair_craftsman_lawn_mower_self_propelled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031eb961-11a5-49b0-b505-28dd07337812/how_to_say_that_will_be_fine_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464c4cee-fa88-4dbb-945d-abf4ed404343/2389547817.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/attack_on_titan_season_4_dub_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7beadd50-79ec-4a81-95e3-4c606ee565ae/cant_change_channels_on_rogers_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae81b2c-72ce-4dae-afab-b2e7a6f4b53b/86676609750.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/pimedowu.pdfIn PDF document text
    • http://puriruf.epizy.com/typographie_a_manual_of_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 5480 bytes
SHA-256: 11ed12ec6c4b9a0ad93d8ea2c9593b73a961a6919af4db9be90feed52b3fb736
font_01_sfnt_off000128ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AC 11176 bytes
SHA-256: f684013c3d595f9d8127008b4e54b4725b90bc37175ad280da0c3e8f7233854c
font_02_sfnt_off00014ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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