Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29237b69e195218…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 22:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 955c1babf5e539690cd4329df2192fa7 SHA-1: 3ecd4a4a0615c2fae8800a5fde0e3aa0535cc81e SHA-256: f29237b69e1952180b1f03462062f89fe819ef1b91ed7754e7e4dcc2b94574c2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to PDF files hosted on various domains, indicative of a link farm. The presence of a critical heuristic firing for 'PDF_SEO_LINK_FARM' and a high ML score strongly suggests malicious intent, likely related to phishing or malware distribution. The embedded URL 'https://jumiwimov.ru/wix?keyword=free+showbox+apk+4.93+download' further supports the lure of downloading software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wix?keyword=free+showbox+apk+4.93+download PDF link annotation
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/259423.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/ludemu.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/ethical_issues_in_psychology.pdfIn PDF document text
    • https://gizibufunete.weebly.com/uploads/1/3/4/4/134492386/198053.pdfIn PDF document text
    • https://namovanuzo.weebly.com/uploads/1/3/1/6/131606642/getamekifat.pdfIn PDF document text
    • https://wakelidegafu.weebly.com/uploads/1/3/4/0/134016727/e080d73a5fdf5c9.pdfIn PDF document text
    • http://gasiwine.iblogger.org/548896872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/43258312702.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/fuluwuxogego.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/14728147155.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/1st_amendment_of_us_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/shadow_fight_3_java_game.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/pobek.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/cheat_sheet_regex.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/9087210643.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/la_la_land_free_watch_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/4808758631.pdfIn PDF document text
    • http://nepafex.epizy.com/73010621253.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_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 5804 bytes
SHA-256: a9939903e1795ee0d652bfb1e1590c1cf887bcc96aebaaeb5a9c04e992f30048
font_01_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 10908 bytes
SHA-256: e8132e515f1e53b588da1db30938e8ff91b80f3f42e58f3f902644fd8eff73f8

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