Malicious PDF — malware analysis report

Static analysis result for SHA-256 360b86025d8f5aac…

MALICIOUS

PDF

86.5 KB Created: 2021-05-25 08:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e742cb3c9bd284802860f534a2f94ce4 SHA-1: 233e8d3fe91c10c25a86f4797824dcacabe78278 SHA-256: 360b86025d8f5aac61bd24463dcb1fe965a3eac2a9f3cac43426a55dec953b06
196 Risk Score

Malware Insights

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

The PDF contains embedded links and a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links. One prominent URL, 'https://jumiwimov.ru/strik?utm_term=sap+s4+hana+ides+download', suggests a lure for a software download, likely a phishing or scam. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://jumiwimov.ru/strik?utm_term=sap+s4+hana+ides+download
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/7223544.pdf
    • https://cdn-cms.f-static.net/uploads/4385228/normal_60328e8fa1701.pdf
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/lisafujixepu.pdf
    • https://cdn-cms.f-static.net/uploads/4477649/normal_60485c5f753b2.pdf
    • https://cdn-cms.f-static.net/uploads/4404975/normal_601e4e027918d.pdf
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/4a03e504a99a76.pdf
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/tupubo.pdf
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/nosezupumiteb_ziwigirikizozu_jawade.pdf
    • https://vepenisa.weebly.com/uploads/1/3/4/3/134339982/vubik_bomekox_mujixavaxufajok_gumifodam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/784c45c1-82ef-42ee-9044-2604b38e0cba/robert_greenleaf_servant_leadership_book.pdf
    • https://uploads.strikinglycdn.com/files/0165a37f-3cb6-4495-a5a5-2a18378ca03e/remupo.pdf
    • https://uploads.strikinglycdn.com/files/ba759df1-b636-4474-9436-fe7b3f3d41b2/shooting_an_elephant_rhetorical_analysis.pdf
    • https://uploads.strikinglycdn.com/files/5650c713-0909-4f5f-bd6e-80e1c2885f4b/reguvuvuzosumenogatidit.pdf
    • https://uploads.strikinglycdn.com/files/62482cb7-78a6-4945-9ed0-eef97c718090/8315331302.pdf
    • https://uploads.strikinglycdn.com/files/b273369e-ddb4-459c-a63c-4aabfa2bf819/rick_ross_hold_me_back_remix_mp3_download.pdf
    • https://uploads.strikinglycdn.com/files/029cb36a-6d82-4f46-ad73-5ff70354e4bc/mafujirivuxixokofar.pdf
    • https://uploads.strikinglycdn.com/files/31d794c8-43cf-4aaa-bfec-c1fa46326b67/50718146858.pdf
    • https://uploads.strikinglycdn.com/files/b8f05292-a7d1-4524-b06f-34701cf6454f/what_does_cooling_off_mean_on_a_whirlpool_refrigerator.pdf
    • https://uploads.strikinglycdn.com/files/4d19792c-283c-4a2c-a2d8-c3da118a95cd/xabet.pdf
    • https://uploads.strikinglycdn.com/files/143e8d33-c252-4c1f-b715-cfaffad3714c/how_to_repair_apc_back_ups_es_500.pdf
    • https://uploads.strikinglycdn.com/files/814811e3-4c70-4620-8e31-8c74f14c2585/83422065931.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe2.bin
54f5942d915beb91cab1f5bcd0468ed20581e91d46ab0464f989d4c30677da09
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 5236 bytes
font_01_sfnt_off000111c6.bin
dd86af8182d8769f2af47a7ce01059f2519731e31b74de2600fe3f4526fad4d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C6 11112 bytes
font_02_sfnt_off0001378e.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 16204 bytes