Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f02fa6b34acdff…

MALICIOUS

PDF

83.0 KB Created: 2021-05-19 03:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb5efb554c4c85b180d82cc2ac432c9b SHA-1: 86783aef56432d0e7ec92aba9ff2776a1ebcbb2d SHA-256: 27f02fa6b34acdffc14681c5d8e5ab4cbbbb7a13ac2cb1117b9da0e65febd864
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation and to distribute malicious content. The primary malicious URL, 'https://resalured.ru/strik?utm_term=law+abiding+citizen+movie+free+download+in+tamil', suggests a phishing or malware distribution lure related to movie downloads. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=law+abiding+citizen+movie+free+download+in+tamil
    • https://static.s123-cdn-static.com/uploads/4402520/normal_6002f14151841.pdf
    • https://cdn-cms.f-static.net/uploads/4458431/normal_60464dfb81937.pdf
    • https://static.s123-cdn-static.com/uploads/4476767/normal_6005af4e803ea.pdf
    • https://cdn-cms.f-static.net/uploads/4365628/normal_6037c223c968c.pdf
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/775aa02d0c.pdf
    • https://cdn-cms.f-static.net/uploads/4427544/normal_605bdc2de843d.pdf
    • https://cdn-cms.f-static.net/uploads/4453718/normal_60465e3747ddb.pdf
    • https://cdn-cms.f-static.net/uploads/4420239/normal_6050e5aa11e99.pdf
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/kadur.pdf
    • https://cdn-cms.f-static.net/uploads/4500444/normal_605de0e8a2043.pdf
    • https://cdn-cms.f-static.net/uploads/4401973/normal_6013611f9ef5f.pdf
    • https://cdn-cms.f-static.net/uploads/4496577/normal_60544a1265546.pdf
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5fefc7da2f70b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3248ed2c-1a51-4a3a-9473-4d499a22afc1/movie_script_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2809ae99-bb00-4f61-8bc2-e4edbac5e443/kung_pow_fist_of_fury_trailer.pdf
    • https://uploads.strikinglycdn.com/files/02765dc3-dffa-4af6-957b-568f08c78222/sepetarutu.pdf
    • https://uploads.strikinglycdn.com/files/39ec0aab-328b-4ad2-ba85-6d57269f1bb8/how_to_install_insteon_dimmer_switch.pdf
    • https://uploads.strikinglycdn.com/files/180b175b-a674-418b-97ac-03c0b200e97e/61480903524.pdf
    • https://uploads.strikinglycdn.com/files/474bb12b-830b-43c7-acc8-6cd1251de00e/is_all_ram_compatible_with_ryzen.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f976.bin
025673b5d514c5bdecaa954677a71c4b538abaaf0f89f2f60cb7db09a7a4852e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 5448 bytes
font_01_sfnt_off00010c0b.bin
099d89093be102135c911a0e1d6cb497d4af1896e50bf9510546e5131dedf018
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 1896 bytes
font_02_sfnt_off00011521.bin
ca488ffd2258aff37a59ddd1f5e3c33e5d53063bfb15e4629709ece5eadafecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 11548 bytes