Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6deb35e89bc4dd6…

MALICIOUS

PDF

68.4 KB Created: 2021-02-14 16:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ef373ad7db705ea274ae01470e5a15b9 SHA-1: 8d25647980a26163e652e18db41a801c14f731c9 SHA-256: a6deb35e89bc4dd65c10f5f76d515c117c0f75364fa91c55bdcfaae804d3e850
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are identified as malicious redirectors or hosted on disposable infrastructure. The document body, though heavily obfuscated, contains references to 'Sony Vegas Pro 15 cracked version', indicating a lure for pirated software. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting the actual malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://crophysi.ru/aws?utm_term=sony+vegas+pro+15+cracked+version In PDF document text
    • https://xamoxuwubedus.weebly.com/uploads/1/3/2/8/132814415/f155effc85a68a3.pdfIn PDF document text
    • http://gramnews.xyz/38921171964aukjt.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/8A6mN1Z/wemoparizudi.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/c8IjzAJ/lausanne_2020_youth_olympics_figure_skating.pdfIn PDF document text
    • http://iuts.space/kawapabejuleginetzi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_6023b8eec88bc.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ghu1hiz/baby_middle_name_generator_male.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/nepofeladonexe_fotozejadu_nebafutobufafa_lalev.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/jjeMggf/32350848149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_602036c25974f.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/jcpijr7/defense_zone_3_hd_mission_10.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/5Fajbgc/exceed_by_money_network_mobile_app.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/gjt3j9G/xulatava.pdfIn PDF document text
    • https://jexujomasok.weebly.com/uploads/1/3/5/3/135343442/cbc020461848e.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/b0pGHl3/56478356424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_601b455ebc831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fe3877e688d6.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/dubiditiginowo/70088705783.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/palesape.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/uc_browser_for_android_2._3._4.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/41340945304.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/operation_alamelamma_kannada_movie_free.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_off0000ceff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFF 5716 bytes
SHA-256: 76070645fff9b2a600e5b92b14eaf866a6ef420bd34a5e562e32290703970e52
font_01_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 9852 bytes
SHA-256: 677677fe0553901c74dd820b67bc33f7334549c3fab97e27b7fefac2cdc6efd4