Malicious PDF — malware analysis report

Static analysis result for SHA-256 340858d88b53133a…

MALICIOUS

PDF

78.6 KB Created: 2021-04-03 14:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f463f80b94008550cdb28d3972840597 SHA-1: b94aee90b10077f1b99fcb6f24e8b9be20ef1657 SHA-256: 340858d88b53133a625869280e808f16a2c1b5fb1d54d960fea7a15ffda7221e
66 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the heuristic findings suggest this document is part of a campaign to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jacksth.ru/strik?utm_term=kitchenaid+stand+mixer+sale+kohls PDF link annotation
    • http://faceskinagainbeauty.xyz/how_to_shutterstock_videos_without_watermarklsw2i.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/ccie_wireless_quick_reference_guide.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/diropozuvoritijeb.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/505643061341jjo7.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/anunnaki_story.pdfIn PDF document text
    • http://mebel-albero.ru/acca_certificate_samplel12ih.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/d_d_5e_character_sheet_editable.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/82711712218.pdfIn PDF document text
    • http://emmetrix.net/puzafepinufevigobokudifetd0q5e.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/native_american_culture_and_traditions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a24d46-620b-4a80-a3fe-8d9c0e9fd9e7/nazagagizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b37680b-406b-4d57-99b2-f8cd0b32048c/how_does_urea_diffuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c2420c-3964-49b6-a1ab-348caea118c6/aoc_i2757fh_27_led_ips_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/wugogafenenivi.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/jowatusof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55f82cb-c3d1-4a06-8f6a-e5f3804bb14e/15010374807.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/all_souls_college_oxford_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b08aac-78a7-4a20-9fbd-f80af4161049/porter-cable_compressor_kit_home_depot.pdfIn PDF document text
    • http://luzojora.atwebpages.com/lemanatomivusivufawato.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/libasutof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2549b2bd-3b3e-4cfd-b949-851990f45511/what_is_the_significance_of_religion_in_society.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/nudonatuzojibajoveg.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/smith_and_wesson_serial_numbers_n_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8c806f-0488-4f42-a4d3-954a2cdace30/who_makes_ariens_mowers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae4b278-8b13-4799-9c3c-f1c25ef78453/57785199030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c011ae-f718-416d-b4a1-fcdbff87f753/29335334188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab512895-8b18-405f-be7e-1f98e5b09048/4183275067.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/what_to_do_in_first_90_days_of_new_job.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_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 5280 bytes
SHA-256: 514b0a85d231f7e6410bd32ec30cbc506a927e503d37ea8b04ad9cb19d44b746
font_01_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 10788 bytes
SHA-256: c3de279971d06fe9f1b52ea0fcfb571f1a4c1500a61e95e16bd5d6bb8108f00f