Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9f489285b0d8bf…

MALICIOUS

PDF

78.3 KB Created: 2021-04-04 21:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cc9e3943851f19512110d6378a317d83 SHA-1: 8c336f41f0f7ec285138222e687252c8c3594f52 SHA-256: aa9f489285b0d8bf134a48ababe566da31bf1caa3ac8d23f2e6f447f9d8c05b8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/123?utm_term=navigation+bar+mod+apk PDF link annotation
    • https://vumazara.weebly.com/uploads/1/3/0/7/130738753/b5170eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5fdc217f2fdaf.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/15300e9163b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_600e43a8d9a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_6031ba4d7291f.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/3841572.pdfIn PDF document text
    • https://pimelotug.weebly.com/uploads/1/3/4/5/134576353/8a2110194f5d.pdfIn PDF document text
    • https://labivuzixifazer.weebly.com/uploads/1/3/4/3/134310915/gexupeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_5fd7a249df276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/kuzekezabiwomefaruzaxi.pdfIn PDF document text
    • http://koxowideza.epizy.com/tijomorona.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/35507949328.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/edge_hill_harvard_referencing_guide_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/71609519735.pdfIn PDF document text
    • http://busugotuwege.epizy.com/fakinufekikuliverelirud.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_f6b95aadc51f4c769423a1fa33897d34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/mevaliredibuz.pdfIn PDF document text
    • http://tabikobi.epizy.com/common_idioms_exercises.pdfIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_84793f6fe67a4e18a622924cbd8ca340.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/wabadevivotawak.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/satejumopofavufu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/fixapidedubuletuk.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_off0000f06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06D 5300 bytes
SHA-256: 0e5399ac8be717d39c82ab99921c8ad0e505d0834933942ceedbf8955fc710e0
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 11576 bytes
SHA-256: cfb968fee79f30c127f091028c08369984694113ed4b982b8bbbaf9a90315c2e

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