Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af5c4965f5491b9…

MALICIOUS

PDF

83.6 KB Created: 2021-03-18 07:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04bad3f5879d259ced5ea578aa274a3c SHA-1: 18aea1ba7485dc16784aeaa6e84de6c6876855a6 SHA-256: 5af5c4965f5491b9f4d68736685a53b697b49f46205ba73550fd9cbd076e8bc7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the primary purpose is to redirect users to malicious websites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://dugedepap.ru/123?utm_term=principle+of+aerial+photography+pdf PDF link annotation
    • http://zitugaxusi.mygamesonline.org/10365958931.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/44940151789.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/982979b72.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/55175359428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_601392b586ea7.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/bupowivalolitakanika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454977/normal_5fe19dd8ea3bb.pdfIn PDF document text
    • http://voxivinojoniriz.22web.org/christmas_tree_decorations_red_white_and_green.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385417/normal_5ffa6d794b44e.pdfIn PDF document text
    • https://xixurisegiwawaz.weebly.com/uploads/1/3/4/0/134012782/2631961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fcaf43c42f11.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/new_york_times_map_us_election.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_604b304f54512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lakadutof/zojejofedipokupaxevixut.pdfIn PDF document text
    • http://totefopige.atwebpages.com/temizemudaligep.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/bahadur_bengali_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fefa77-7468-4b28-b71c-04e4d1972e70/does_accu_chek_aviva_plus_have_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b31ec27-ebf7-42fa-a980-131e26cebaab/zigeviwapufejekemeduko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567893f0-0ac6-4c40-a49b-22089e3d9e8d/what_does_slant_stand_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e91ff84-5d62-4c52-9457-69038753042d/99521544660.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/in_what_order_were_the_pauline_epistles_written.pdfIn PDF document text
    • http://rogitefivox.epizy.com/are_gas_fireplace_inserts_worth_the_money.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_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 5344 bytes
SHA-256: 681eb6236600b37f55d82b06e7d58bbb61d32bf320d8231afbd624e289c85409
font_01_sfnt_off00011c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2F 10728 bytes
SHA-256: 933443429df9a74ac6351d2c15e2dbb0e0359b0cd60d9d162d1af06e6b14fc77

Open this report in the interactive analyzer, or submit your own file for analysis.