Malicious PDF — malware analysis report

Static analysis result for SHA-256 a792fd9386972066…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 23:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8a425d18a6a04744679f9f80557d91aa SHA-1: af708623c9443d4df5f99a1fab2df61ccb2c9a51 SHA-256: a792fd93869720664aad9509197ed70effc66b63b0e94da18a570e1553d638ed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=nova+launcher+prime+5.0+apk+cracked PDF link annotation
    • http://gojawufeki.getenjoyment.net/what_makes_an_argument_valid_in_logic.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/8978777.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/zonoxakoramemakukaz.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/giremosisu.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/wovulaxomureso.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/butazobejexilapenupajivap.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/how_long_have_prisons_been_around_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_603c7034e5bd3.pdfIn PDF document text
    • https://xesupolapiban.weebly.com/uploads/1/3/4/5/134586318/2153798.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/bm_das_physical_anthropology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5ff509ec8befa.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/278a17f5d98ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408002/normal_5feb47c1e4fef.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/22f22b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lopafulobitap.atwebpages.com/classroom_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/photo_sharing_app_for_ios_and_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90cb05e3-5398-4c1d-979e-bb22c2332d0e/niwiwoni.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/absence_excuse_letter_for_school_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/what_is_caste_meaning_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/68075439933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562cf2a0-2655-441a-a872-c48d54fc5ff4/saluzadokosesiparonulubeb.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/2007_buell_xb12r_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1762477-e087-4a63-9139-21fc18aefa0e/how_to_search_images_on_google_by_size.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 5524 bytes
SHA-256: 3321529d88b07aceb2b8e28d7340bbc21e3633c618e72a1143cf9232d0786399
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 11376 bytes
SHA-256: c99d285fa50309360c75f4764f836adea7dad9010d6084f458b5dd7c6ba70d99

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