Malicious PDF — malware analysis report

Static analysis result for SHA-256 07240931b146ea3f…

MALICIOUS

PDF

93.0 KB Created: 2021-03-21 03:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 5c6e4006d82056f186bf77b32cd627d4 SHA-1: e3cacfcc5a960a79b336efb58730a59ad5104fc4 SHA-256: 07240931b146ea3fe23f74ca1d4cfb2ddd09c5b63d7403e757c610e29a89d080
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a sewing machine advertisement. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://xezojetit.ru/aws?utm_term=singer+futura+xl-580+sewing+and+embroidery+machine+affordable PDF link annotation
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/79393ffd52c9eff.pdfIn PDF document text
    • https://visoxifa.weebly.com/uploads/1/3/2/7/132740860/zapuvajobafawa_sabageve_gativanefosona.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/wjgUyVB/87708800071.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/21594b08e5be571.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/dhajmji/life_list_bucket_list_premiums.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_604aa81ab9864.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/kuxiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_6029551cbfc74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_6046f1a16a84f.pdfIn PDF document text
    • http://zepofevof.22web.org/wawokadugotulinateze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_600220b252fa4.pdfIn PDF document text
    • https://tesewipelevifiv.weebly.com/uploads/1/3/3/9/133997178/dapofolo-metiredizusop-zozigufoson-wogorit.pdfIn PDF document text
    • https://bozalofagolukor.weebly.com/uploads/1/3/0/9/130969011/021f1.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/e55fe0432c1d368.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/F5hbThf/panaeolus_bisporus_trip_report.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/ijb5gdI/82819279097.pdfIn PDF document text
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/2f2ac8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulixamurot.rf.gd/polar_ft60_chest_strap.pdfIn PDF document text
    • http://magonusu.epizy.com/frozen_movie_songs_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e06e53c-38cf-4156-9cf1-892d886748fc/51613487394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a4d77a-1f25-4fef-b698-04b17d0cf6ee/rental_agreement_format_ca_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0c3e03-4de1-40f5-a62a-7d26f97ef21f/69313309557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d53de1-89f8-4e43-b0fa-c1fe661e253c/52889195225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d12d80-6ac5-4177-991e-914170c7f768/13099665401.pdfIn PDF document text
    • http://parezorizujax.rf.gd/kopejajezilopaso.pdfIn PDF document text
    • http://muvuxuduxe.epizy.com/gumikosivumufivubixuw.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_off00012a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4B 6432 bytes
SHA-256: ea4b6dfb3dc8c78f67d3cd42e578ca7ca90a005890b230fa55d030c4c4c20d87
font_01_sfnt_off0001401e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401E 11060 bytes
SHA-256: 0b071a8a763158882df4ab9f4039b71800c27ba3a53516cb0b6a023b1e4fcabb