Malicious PDF — malware analysis report

Static analysis result for SHA-256 3146b9e463fb7940…

MALICIOUS

PDF

78.4 KB Created: 2021-05-27 05:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab47cb0cc145fc038352b09bbad8ecb SHA-1: 7361d33782d2c644e40820f2cc29d83eb3d68ab1 SHA-256: 3146b9e463fb794087ed41578aab0a4a57e96d4830cc3d93b295af35aca5c46c
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one prominent URL pointing to 'baarspo.ru'. This heuristic, combined with ClamAV detection and ML classification, strongly suggests a malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to create a deceptive link farm.

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://baarspo.ru/strik?utm_term=andron+u+andron+totron+led+lights
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fc68007a11b6.pdf
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5fce88eced45b.pdf
    • https://cdn-cms.f-static.net/uploads/4446784/normal_5fdc217c76e2a.pdf
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5fe6917fde3ed.pdf
    • https://vawanateriti.weebly.com/uploads/1/3/0/9/130969814/lusanizugo_kawixapodana.pdf
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6012c15933935.pdf
    • https://mapimodedafibo.weebly.com/uploads/1/3/4/7/134708703/236a682628b10ec.pdf
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/suxugoresajusosimomo.pdf
    • https://cdn-cms.f-static.net/uploads/4387806/normal_601fef59eed85.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/498f05ce-e3d8-4ae5-a619-ab45bd39b57f/vusuguri.pdf
    • https://uploads.strikinglycdn.com/files/9710d387-a064-41de-a1dc-6a1c7e67047b/41749636029.pdf
    • https://uploads.strikinglycdn.com/files/591c7906-cb74-4b55-aa6b-7928375f10d6/40071355735.pdf
    • https://uploads.strikinglycdn.com/files/59c4773f-2e44-4ab0-8fd2-973084717932/62531006312.pdf
    • https://uploads.strikinglycdn.com/files/82ddb48d-badb-4c35-94e8-c75a51e62ad5/visual_basic.net_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/6512f162-3afb-4f52-9ff1-8d2a81d5d713/4_pics_1_word_level_2159_answer.pdf
    • https://uploads.strikinglycdn.com/files/3020bdf0-c286-4951-9136-f376762f0ab5/nijumariritos.pdf
    • https://uploads.strikinglycdn.com/files/bfaebb15-c893-4938-8886-17af56f13a5f/what_is_the_fracture_toughness_of_concrete.pdf
    • https://uploads.strikinglycdn.com/files/d17ee9e3-1128-489a-b78f-c12ed435fcb4/35708467347.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_off0000eb75.bin
ac6b3af61cf1ba1165b913aa6e28ef09bb28eb54f7c3373f4e70daf3becc1347		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 4960 bytes
font_01_sfnt_off0000fc41.bin
289d6aeb7c6fdf609db084c809b3036a72ff27d89cee7b1a9fa994387c09f698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 9976 bytes
font_02_sfnt_off00011e30.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.