Malicious PDF — malware analysis report

Static analysis result for SHA-256 180b70d34f5642ee…

MALICIOUS

PDF

104.9 KB Created: 2021-05-11 07:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5c21f9d3f1343e939d4a838526a0372a SHA-1: 8192909ca241f4684b78431141d3af8dfbcdceb6 SHA-256: 180b70d34f5642ee76445f007121733a3a2dd7e7c573ed2fe1c1d4b059b32b70
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/strik?utm_term=que+es+comunicacion+digital+segun+autores PDF link annotation
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/wefokiserow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_603f300f9e7af.pdfIn PDF document text
    • http://sipamuxagiporen.iblogger.org/hack_wifi_zte_di_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450509/normal_603a6ef9bc622.pdfIn PDF document text
    • http://guvizaw.22web.org/bedubudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fd680ce7511f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475197/normal_606784f6a3479.pdfIn PDF document text
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/zigideruzoj_lilun.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/bleach_official_character_book_souls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_60464855482da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fd64bcbb37d7.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/bonsai_tree_care.pdfIn PDF document text
    • http://bewepovuzif.iblogger.org/14228578049.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/87615974684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_601a6369f09da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_606b3f49e8a09.pdfIn PDF document text
    • https://simamofot.weebly.com/uploads/1/3/3/9/133997368/307a0.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/cdc5b821-7ba4-4305-8f52-3343ed1d83e4/is_1280x720_good_for_streaming.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/aircraft_design_a_systems_engineering_approach_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46841d13-2fe1-4391-a992-8800fb7eeaac/how_to_play_modern_magic_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd356b81-ea4b-4d7d-920e-253f4b93cedd/flowers_for_algernon_test_answers.pdfIn PDF document text
    • http://jexuzutipeku.epizy.com/dupujiriziziledenavudor.pdfIn PDF document text
    • http://sibexelopuni.epizy.com/why_is_my_redmi_note_3_battery_draining_fast.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/frank_o_hara_meditations_in_an_emergency.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_off00015af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF6 5320 bytes
SHA-256: 5f8398899c183f25965a7d9b242454af5695ca3965200c3f69f41ac2da070dd7
font_01_sfnt_off00016cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF7 12084 bytes
SHA-256: 61da8596e64b63fa53392c3a1e0007266abeb03dec30b654dcfc9c48eb36fd1d