Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7943fbc62ec70c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-21 10:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5765c34da73a7f638e423742f93e05c5 SHA-1: b611f26b9a30c98b6a0c30bb8a82855b7047613e SHA-256: 0b7943fbc62ec70c05fa5cc09de003784a2cab02225e96a2dafdf37fac060cf0
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, specifically flagged by ClamAV as 'Pdf.Phishing.Trojan'. It includes an external URI pointing to 'resalured.ru', which is likely a malicious domain used to host or redirect to a second-stage payload. The document body, though heavily obfuscated, contains text fragments related to 'clash of lights s1 download apk 2017', suggesting a lure for users seeking game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=clash+of+lights+s1+download+apk+2017
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fe9f2a8e2cca.pdf
    • https://cdn.sqhk.co/jupurutage/vfjhhd7/5617514227.pdf
    • https://static.s123-cdn-static.com/uploads/4386609/normal_5fdd499ca499f.pdf
    • https://cdn.sqhk.co/begokaxawip/jdjeoZp/48943846380.pdf
    • https://cdn.sqhk.co/kerametunal/UadKhf1/madegasu.pdf
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/pilexadifajo_mowuvizixu_tugulota.pdf
    • https://cdn-cms.f-static.net/uploads/4402706/normal_602df30cb8c44.pdf
    • http://fuxanujibiz.mygamesonline.org/puzojubugene.pdf
    • https://cdn.sqhk.co/nagebagem/biekagd/bojolidovoto.pdf
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/gedunobaxibi-xawetup-waruxetesolef-nidujugu.pdf
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/7078500.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remuv/34930117763.pdf
    • https://s3.amazonaws.com/regufojalojaza/jessore_board_jsc_result_2017_with_marksheet.pdf
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_9fe0349c09064ab6bbbfa416ce9144a7.pdf?index=true
    • https://s3.amazonaws.com/temujonuwu/healthy_diet_plan_to_lose_weight_fast.pdf
    • http://zuzopejorexa.onlinewebshop.net/80655472969.pdf
    • https://s3.amazonaws.com/xufoxorog/45504993773.pdf
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_0c65b7341cbb461db203f57b28f53d52.pdf?index=true
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_cb540157e9ee431cb2cd2ef4421ce4f7.pdf?index=true
    • https://s3.amazonaws.com/vazisi/induction_program_report_format.pdf
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_59c12f015ffc4617823bade8beb4d255.pdf?index=true
    • http://vimixof.onlinewebshop.net/pamuvaxudej.pdf
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_b2093379917f4912ae3bfd8669ec5c71.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec16.bin
3a77e3f8e531e71caaa020aa906da3b973adbd7177e92a74a8cad3e057e3da68
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 5672 bytes
font_01_sfnt_off0000ff8b.bin
4093a52d75a832598fca44b518e366d7ecfcc63e86bf0ac282e6a8bf07626799
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 10408 bytes