Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b67ec3f2333dddf…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 20:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03b3726fa2028c6423b6e15c7701481a SHA-1: 0bbfc100dc97d1e7d0c98ed053c7f83fdae03b3f SHA-256: 7b67ec3f2333dddf16bbd5064ea21076b50983948e2ec1496153924fcb95ae48
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is also detected by ClamAV as 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a reference to 'videos from instagram app free', which is likely a lure to drive traffic to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=videos+from+instagram+app+free PDF link annotation
    • https://jefupijoban.weebly.com/uploads/1/3/1/4/131437873/tafowelujewopuge.pdfIn PDF document text
    • https://witetalujoloxof.weebly.com/uploads/1/3/0/7/130740434/5f44689a066fab6.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/pujadubopi.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/pupugakejepiwin-koxelebifeti.pdfIn PDF document text
    • http://idealica-uficiale.website/88872888787xuexw.pdfIn PDF document text
    • https://pifunugujo.weebly.com/uploads/1/3/4/4/134455612/7469426.pdfIn PDF document text
    • http://instacopyrightcenter.com/stanley_fatmax_xtreme_25_tape_measureyol4s.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/vumurawuka.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/jesonepufun-pedixovada.pdfIn PDF document text
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/9312309.pdfIn PDF document text
    • http://eagleaff.com/does_being_tough_on_crime_work64wj8.pdfIn PDF document text
    • https://duzigavejad.weebly.com/uploads/1/3/4/5/134513143/kasumosiziwomu.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/6615445.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/86619312968.pdfIn PDF document text
    • http://ontrade.top/m_audio_firewire_410_driver_mac_os_x_10.9.5s3z7e.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/f360d688-c21b-4bf1-9341-f02e21c9a58a/99338885229.pdfIn PDF document text
    • http://bepafazo.epizy.com/39209145101.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/kigotodojitiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5148275e-7ffd-4396-ab71-d000084b4dcc/4015893516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f784b76b-07ff-44d4-9c52-988b5a070537/pioneer_avh-x1500dvd_wiring_harness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954059c8-3c65-4d32-a786-03144dc5c0c6/xopidisileviribujufoxus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a85fe0e-df74-46b1-93e3-8d8aa5740e96/what_does_eye_of_horus_tattoo_mean.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_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 5296 bytes
SHA-256: 9dc055aea0db824e9f20150898a20fb09028808c11bca30a0aae589a644cb340
font_01_sfnt_off00010a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3F 10860 bytes
SHA-256: 8e8aed57550fa73d259cd2cf50ab693104acd3feed4a1c891571e287d02513ca