Malicious PDF — malware analysis report

Static analysis result for SHA-256 562ca4cf7a0e6fa2…

MALICIOUS

PDF

71.5 KB Created: 2021-01-26 17:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d60327b2b073011108faaebcbae1e9f4 SHA-1: e45b3a5d0ada906c657c66235745b8ef302b3702 SHA-256: 562ca4cf7a0e6fa25ae241beca402a0046c89506744b459821dcd7e129b8939c
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffine.ru/wb?keyword=lenovo%20chromebook%20c340-%2015%20case In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5fddf6a5ed37a.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/bovirakig.pdfIn PDF document text
    • http://chatik85939775.fun/ballout_glo_igiazix.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/939c46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_5fd673d6ebb72.pdfIn PDF document text
    • http://submonster.xyz/free_mp3_music_app_for_iphone_offlineilr1s.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/nomesidodimogik-tupom-tajana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5fcb18bc6312a.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/9551448.pdfIn PDF document text
    • http://boevoenlp.com/today_s_forecast_cleveland_ohiornyy6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd3a4823b41.pdfIn PDF document text
    • http://qiwi-wallet.online/cute_puppies_for_sale_near_me_freeoqkhd.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/wujakizimorabitavoli.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/jirul-bafixifu-budozasak-figejubapanodav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5fda87541d93b.pdfIn PDF document text
    • http://fruitnaturs.space/world_conqueror_1945yfsps.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/839ec9.pdfIn PDF document text
    • http://card2card.live/back_to_the_future_hoverboard_skateboard_sticker191cw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lofese/xenia_ohio_crash_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/97300791658.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/google_spreadsheet_for_bills.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB5 5472 bytes
SHA-256: addcc5919214d9a1d4f9a12d5c0b7f710c64ddc8e8f3dd4f572f155364b3804b
font_01_sfnt_off0000de2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2F 10708 bytes
SHA-256: 9fda79c18d42d1787e2695699ab8ad61084a40941997b08427679092ac6657d1
font_02_sfnt_off0001025f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71