Malicious PDF — malware analysis report

Static analysis result for SHA-256 75168722ecb70ec0…

MALICIOUS

PDF

82.6 KB Created: 2021-03-13 16:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 23d1c331a9f1ab218527f14b17910154 SHA-1: 3ceebdbac43b5ee79d47c252919ba0c8777209d1 SHA-256: 75168722ecb70ec07ea46e337ea86d2fb14721824363e9e6372ed967d6bb55e2
134 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with a prominent one being 'https://golowaki.ru/wix?keyword=view+private+instagram+followers', suggesting a phishing lure related to social media. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/wix?keyword=view+private+instagram+followers PDF link annotation
    • https://bubefotuline.weebly.com/uploads/1/3/1/4/131438432/5952151.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/982cc3631d475.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/baluxilamuwarorosorika.pdfIn PDF document text
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/tutamela-karixotumag-lalop-miwetoxuz.pdfIn PDF document text
    • http://nelefir.22web.org/audi_s4_avant_2017_gebraucht.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/radiation_heat_transfer_modest.pdfIn PDF document text
    • https://rawewefugu.weebly.com/uploads/1/3/4/3/134394717/vulopolotemokowo.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/babegoxoparuna.pdfIn PDF document text
    • http://krepezh.guru/observer_reporter_cutest_baby_contest_2018t4foh.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/giwikawoguvubutefogox.pdfIn PDF document text
    • http://cparta.moscow/which_sleeping_position_relieves_period_cramps860pj.pdfIn PDF document text
    • http://fredo.run/voxusizm7k8q.pdfIn PDF document text
    • http://itnegozio.info/mexaxutapajuzenakoziadsin.pdfIn PDF document text
    • http://begetus11ppz.xyz/sowuluzuvokek5z.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/mukutud/devakakuwewagu.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/britax_marathon_clicktight_latch_weight_limit.pdfIn PDF document text
    • http://nutonujisebife.epizy.com/descriptive_research_sample_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/brakeman_report_2001.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/84830622621.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/walevaxumunupugenu.pdfIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/94999239497.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/89463570280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1fe519-a7ca-4db2-bd0d-0642f964b593/what_is_color_theory_in_fashion_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe5de79-10d7-498d-8131-13f3d251bad7/hp_photosmart_d110_does_not_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6c5b3b-76e6-4606-8788-0d7fbaea3b55/viktor_frankls_logotherapy_the_search_for_purpose_and_meaning.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_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 5340 bytes
SHA-256: 97370fc205dcf1112740e357cad8a848d593197019750634be2d0b68ebe8413c
font_01_sfnt_off000114dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DD 11652 bytes
SHA-256: 43393915a7823e22c3796c9026b80520ec2aafbd333784645a051cffba4fb602