Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bdb3534c588b8c…

MALICIOUS

PDF

74.8 KB Created: 2021-04-12 00:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5770ea1cbe11ef322dba3b2dd6a4eefd SHA-1: c8e702b7d8a9beb047da1e67f907d953404bc07f SHA-256: a2bdb3534c588b8cc9bb4a167b6be32aee80fdcabb3d22d2b4f06ca661c73707
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity 'Image lure linking to an SEO redirector (free-download phishing)' and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL 'https://maypoin.ru/strik?utm_term=python+programming+examples+advanced' is identified as the likely destination for this phishing lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=python+programming+examples+advanced PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5ff95f9c5d06c.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/eiiih52/tubijafin.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/vabusepedonelivopopivit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_60017c79448aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5febe9739c205.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/gjhFY4x/lucky_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/bKz4rqE/mivegonovedenomuduvogewo.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/hihgjhd/zoziligukukiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fee2c4fd37a2.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/gfAiiab/55904098807.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87ab43c-4905-4411-a892-bd7a2a520115/fomoluxewaxumejejunigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5c59b5-8fa9-42c2-9afc-ca0550d8866d/97957694334.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/cuanto_es_1_metro_en_pulgadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f293fde-0b9c-4600-bbb6-8428170f00f0/onn_wireless_mouse_customer_service.pdfIn PDF document text
    • http://ledaxefamadore.epizy.com/acr_eular_guidelines_for_systemic_sclerosis_classification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8e8f5a-863e-4243-9934-3b90b334e6b6/medidor_laser_bosch_glm_80_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54861be0-1b20-4223-910c-c39ba0827428/patulukaligu.pdfIn PDF document text
    • http://tekonut.rf.gd/autocad_2019_plant_3d_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3c82f5-b400-42d0-9d05-b690ab575cfd/silewokulokela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1f4601-9cf7-465a-84f4-4dfcbfa45641/tanuzanorojex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbff5bc0-982a-4208-9016-1b07bbbe1e32/the_pillars_of_the_earth_movie_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afdbd99-7e9b-4006-b251-1d44be114188/tavodepotupokosof.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 5716 bytes
SHA-256: 3cc7b84e97c6a480e7034636f52f2b3b65d23a011b9dc9972a20d3c59bd92e80
font_01_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 10804 bytes
SHA-256: 62b8a7a2811d1882145bdd5c31b7b8e943eb1fe71762cd8a061a448ebc6eb994