Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5ab57dd53efb99…

MALICIOUS

PDF

88.5 KB Created: 2021-02-26 02:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b13c581480c5eb777b932b7126f6cfee SHA-1: ce065e26376e2a87aaedb12c52ded2710540b9dd SHA-256: 9e5ab57dd53efb99c9483e20b1f95c628233613f8fb2e83c465efa98d6a0a782
222 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'Toro subsurface irrigation design guide'. The presence of a download button heuristic further supports a malicious intent to trick users into clicking links that likely lead to malware downloads or phishing pages. No scripts were extracted, but the PDF structure itself facilitates malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/strik?utm_term=toro+subsurface+irrigation+design+guide In PDF document text
    • http://zosujobitusup.iblogger.org/99231647092.pdfIn PDF document text
    • https://warexuzema.weebly.com/uploads/1/3/4/6/134601764/kizoluraz-romagegagi.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/jc3qwhS/dreamline_essence_shower_door_installation_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5fdc16bb4f0f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_6012a91935f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_60230f3e4bfd2.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/iQhbgTW/premier_league_official_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/hfjf5wV/42496235734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_60247e538a15e.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/gcIjfjf/subway_sub_of_the_day_thursday_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/jbypiek/brazil_fifa_world_cup_titles.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/ihaibpE/gubusid.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/g9U8v3L/97772996336.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/dYZICCV/xaketodiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_602f1d53535b1.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/F0HieD8/emergency_contacts_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/iaQWqrP/18975980465.pdfIn PDF document text
    • https://nujirami.weebly.com/uploads/1/3/1/3/131384028/4464073.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/KF7Tjcg/xokidatizuxigatujogapis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwefotikejumu.rf.gd/capsule_size_and_fill_weight.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_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 5248 bytes
SHA-256: 377970ce36141d57e968ad04f466f22175551f2559a70a45ae0dadeaf470031f
font_01_sfnt_off00012d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D42 11708 bytes
SHA-256: 8b59c1c1faab333b4457c1233cfa634e56f5a24ae8caf92e6676dd09bb182c8d

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