Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9bb8ba1f1b91cf…

MALICIOUS

PDF

85.1 KB Created: 2021-01-28 15:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e17f01d2b345f2a439c72a3277fd4ace SHA-1: cb7944361a771eb6830c2d9378c739de55538de4 SHA-256: 2f9bb8ba1f1b91cf488682b140112725a40e3dcf25af0c785756218f9366dda0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. The presence of multiple disposable hosting domains and UTM parameters suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent to redirect users to potentially harmful sites.

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
  • 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://jottigo.ru/wb?keyword=final%20fantasy%20vii%20remake%20pc%20price PDF link annotation
    • http://krokoboko6.xyz/26696005252jpth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fe5318ca2d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/cjfZFXZ/spiritual_awakening_test.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/fab993aa.pdfIn PDF document text
    • http://paypallsecurity.com/muniwabunuwozexidogexelij0qsz.pdfIn PDF document text
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/3040258.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/fhaXhdM/70253798651.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/j0jigjF/39210890748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446287/normal_6003515a4718b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fdf2dd758d5d.pdfIn PDF document text
    • http://dayzcommunity.info/725726548659x87b.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/ijhhihJ/lijufenusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488116/normal_5fe16c9630239.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/cQtjdQc/counter_attack_multiplayer_fps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5fed1955312e9.pdfIn PDF document text
    • http://www.opentle.orgIn 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/vanatul/game_buzzer_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/naxodurorikabefozuwerodiw.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e1cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE1CC 16396 bytes
SHA-256: c0a778a45a4b2c7ddcb19fd9c1d1409e521514f4a41063b76f5cb97aa24d9067
font_00_sfnt_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 5020 bytes
SHA-256: 8a3b2b5a3b5245ce97879dad731f5f73f30250040aa0e6040ba10cc2d77846a2
font_02_sfnt_off00010f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F15 11792 bytes
SHA-256: 36dfbd5c2b428a5c1103cb4e3075c2e9df65f33731752c39a1ef70f269037e04
font_03_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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