Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dc6902d76b3350…

MALICIOUS

PDF

80.7 KB Created: 2021-03-22 01:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f83262bcf09b58d6cd418006d61bc37c SHA-1: df8ec69a270bbc4792b22a304ae461104217889a SHA-256: 75dc6902d76b3350d02b116685e94b6d0f0cbcbc800609a7648dd1d7555cca3b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The presence of a specific lure related to a '2010 chevy malibu transmission recall' suggests a phishing or social engineering attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://lozipotod.ru/strik?utm_term=2010+chevy+malibu+transmission+recall PDF link annotation
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/ferijegi.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/Ug7gglk/guide_for_human_fall_flat_2019.pdfIn PDF document text
    • http://lizetadolanut.iblogger.org/75449025328.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/he0ibia/8006461087.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/kuboreze.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/kjhVjgg/57264327495.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/jbjdAUe/lost_sphear_character_guide.pdfIn PDF document text
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/xowilekid.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/gghdjiq/forza_basketball_shot_returner.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/dHjhAjg/wakikililovilidenefibifed.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/ayushman_yojana_card_online.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/eLZDhfL/new_supercars_coming_out_in_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
    • http://nopizapokife.epizy.com/98465351502.pdfIn PDF document text
    • http://wopawotejexu.epizy.com/fibonewamabi.pdfIn PDF document text
    • http://kexafobe.rf.gd/enigmatica_2_expert_server.pdfIn PDF document text
    • http://gasapiloxa.rf.gd/iphone_wont_connect_to_mini_jambox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d0d3f0-702f-47b5-8b3d-0ab6547698d6/english_conversation_exercises_for_adults.pdfIn PDF document text
    • http://kitoxari.rf.gd/11274213027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edae23a1-8d99-4dc6-8d6e-4452fca36080/what_are_the_rules_of_the_internet_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570503a5-3b13-4c00-83a8-59616d761b97/vimetowixatuxovunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68bbabd8-7427-42cb-bc5c-0ed500b3106a/ap_literary_terms_list.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_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 5452 bytes
SHA-256: b3bcb7978f113cba18f14728096e4dc88eb9a9f599d5fe129f8e7a9fe346c3ad
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 10652 bytes
SHA-256: b2679ae1ea12343c92cca60e8f452bb4dc28356829fde47619e1c9b41581b9aa
font_02_sfnt_off00012711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12711 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e