Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b58ae85e704652…

MALICIOUS

PDF

81.1 KB Created: 2021-04-07 14:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8ddde65f5358078d183418887d9a904f SHA-1: 89f58aaeabc7fc4639b777388fc1fa9dcdb118e0 SHA-256: b0b58ae85e704652fa55842e89b2a0f7ee4d7ea23f6c9e388ee5544ea9f934d2
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, indicating a likely attempt to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a phishing or malware distribution vector. No scripts were extracted, but the overall structure and URL distribution are indicative of a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://baarspo.ru/strik?utm_term=will+a+maintainer+charge+a+battery PDF link annotation
    • http://recepty-dd.info/how_to_do_a_roman_toga_costumeky9bv.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/hopper_3_wiring.pdfIn PDF document text
    • http://ovca.space/nojanetikunuzezofomuwuxex7rx89.pdfIn PDF document text
    • https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/4013288.pdfIn PDF document text
    • http://lavka-karamel.ru/672797172717vggg.pdfIn PDF document text
    • http://fovuvizoge.22web.org/electrochemistry_worksheet_high_school.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/wisp_mode_vs_repeaterdku6d.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/4c0b21a633c45f.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/the_devotion_of_suspect_x_2017_english_subtitles.pdfIn PDF document text
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/243197.pdfIn PDF document text
    • https://wexokoxenasebun.weebly.com/uploads/1/3/1/4/131406289/b7b8ba60.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/evangile_de_jacques_apocryphe.pdfIn PDF document text
    • http://sodalabs.pro/bufegalutitukanan67t3c.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/bigelesulug_dazena_lonuninowa.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/f782fa8a-fd9c-4cfb-bec8-317159d20ecb/samsung_ce0168_manual_free_download.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/satiwebajepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9348bc-66d3-4c08-bc31-02124b08c912/tamesirisonixidipofup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefc1d75-39f9-4fd4-8f44-e60f493b666b/85904258975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f3e445-864f-4987-8c03-db035e67c574/tegixigobenulogogupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf1eb87-f153-4600-87ab-a129133b9159/samsung_galaxy_s9_new_price_uk.pdfIn PDF document text
    • http://zadabodemuliju.epizy.com/the_last_time_we_say_goodbye_synopsis.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/49029304480.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_0d0ba0a775a54581af07ff067f6677e4.pdf?index=trueIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_aa8ef41b08294579b749cd429195acba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 4968 bytes
SHA-256: 437b7e6cb9867ccbc75174aec93512c8284fe7feb324fd24e86fea989e488fa4
font_01_sfnt_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 10556 bytes
SHA-256: 9dac5ac06fbf84dfeb8ed32490ba25da8848c1749d179774650fa48147730848
font_02_sfnt_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f