Malicious PDF — malware analysis report

Static analysis result for SHA-256 343ca9bc39fa9b2c…

MALICIOUS

PDF

82.2 KB Created: 2021-06-05 06:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 086063ba182bfba6b0ef7a6245f292dc SHA-1: 22dfe9addf5746d5398ac8721acf4cb8030fbb90 SHA-256: 343ca9bc39fa9b2c374146ac1e0434a9dde50e3886b80029089a5cec67fe3a21
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to downloading movie content, a common lure for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/pbw?utm_term=twilight+2009+full+movie+hindi+dubbed+download PDF link annotation
    • https://tubidexoz.weebly.com/uploads/1/3/5/9/135994678/e890119203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_603d0ac7e44a2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4402032/normal_60b3b7e810459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_60155acfb3872.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/75fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_600a76f91c0bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_601b8a619dba5.pdfIn PDF document text
    • https://nasuvanebi.weebly.com/uploads/1/3/5/3/135393195/791658fbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fecc19490d64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420036/normal_5fff3d47565fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_602f8773db23b.pdfIn PDF document text
    • https://bomovote.weebly.com/uploads/1/3/5/3/135398027/wemopigobabo-tanom-rotiteri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_60607fc9cb5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_604b2093a82e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144526962/fubizinitopakifid.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/w/file/fetch/144514326/new_tamil_movie_video_songs_download_isaimini_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e70541-3981-44a1-88fa-d02d604b2bf0/rilegedilevaxodu.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/mekewadiwubirinafakawin.pdfIn PDF document text
    • http://kejuziz.pbworks.com/w/file/fetch/144594573/prednisone_davis_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367cd90e-af05-4028-9468-cef3435c180e/how_to_get_more_sun_on_your_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d33b22-eb03-43b8-9f57-27beddf08f6a/what_does_percentile_mean_in_gre_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b2fb75-f1ef-46c1-8516-cd03db6c718d/zuxeridejoluraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b8cc17-ef09-48de-be3f-6df9b382d350/bisuleto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 5600 bytes
SHA-256: 609bf9828896cd0ea130d605da3f3bb597917bf4d72c484d087c2a20c8607a15
font_01_sfnt_off00010750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 11036 bytes
SHA-256: 25177a607a5a818b4578345c87bcbb04b89decde31c9b82568403e5d43e51f2f
font_02_sfnt_off00012d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e