Malicious PDF — malware analysis report

Static analysis result for SHA-256 966b8f139d106aee…

MALICIOUS

PDF

91.0 KB Created: 2021-03-15 02:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7c25c79aa89ba70ac853abed5c021aa3 SHA-1: 51bf477bda06514fcb81f8d25ccd048e9e264a52 SHA-256: 966b8f139d106aeefe4dfe2c1eaae5034b5cd83c19af8147f56e38d0737387c6
194 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a malicious SEO link farm, containing numerous external links to disposable hosting domains. The presence of a "download button" heuristic and ClamAV detection further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=the+code+of+the+woosters+pdf+download PDF link annotation
    • https://ruxabetuju.weebly.com/uploads/1/3/2/7/132740595/naranasazizoken_vikivaletukopig_kibepomiwuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fc574b16a513.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/5675820.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/kuwozimefekux_fagoxabizaneva_bomojotixero_pitozeme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5fc6233d3a635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_6031901a4cd78.pdfIn PDF document text
    • https://tinedejoditof.weebly.com/uploads/1/3/5/9/135971312/28bcc3c51d.pdfIn PDF document text
    • https://wadenipix.weebly.com/uploads/1/3/1/4/131408068/tizakotarujoner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_601727330868e.pdfIn PDF document text
    • https://wodirukuz.weebly.com/uploads/1/3/5/3/135398055/2de4de9e187a.pdfIn PDF document text
    • https://pezobarifad.weebly.com/uploads/1/3/5/3/135394950/818b293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418973/normal_5ffc68367ee7c.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/928485c6-8c5d-4b8c-8846-57c5f0c98257/equation_standard_enthalpy_change_of_combustion_of_propan-1-ol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833d3135-81b9-4a38-b49a-f7d2df25b1e2/zilerupokamigimexog.pdfIn PDF document text
    • http://lipesomidu.epizy.com/zexufavexosepibuboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb50874f-5ca6-4811-828d-8d0747e4a544/zenumekuvorekudowona.pdfIn PDF document text
    • http://debetofewozuri.epizy.com/enoch_powell_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17aa378-e4b2-45e3-aa1f-45059c80fc88/62486507437.pdfIn PDF document text
    • http://tijawob.rf.gd/31988827786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ee481b-f635-438a-a250-180f66ebaf85/how_to_start_your_own_market_stall.pdfIn PDF document text
    • http://zikukoji.epizy.com/facebook_sign_up_free_online.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_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 5284 bytes
SHA-256: 0e7c95202e476beab7dc27398ae3f709bbba8c08e69bd24781f0e00677e423b0
font_01_sfnt_off000130c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C7 13724 bytes
SHA-256: 975f1a6cf8aa2b42e0783a12d5fdec241bd4eb3ad032f5600febe7212074bbe0