Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8e5b37b6262c3c…

MALICIOUS

PDF

76.2 KB Created: 2021-02-22 22:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f84cea86c13a797517cc374943d894be SHA-1: 48e32a222534cdddbe46f4555c05e54a2aae0ee6 SHA-256: 7e8e5b37b6262c3c3d43f74efaac59de9def20d6fa2d5dd9fcda1b4395c111ae
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, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/aws?utm_term=how+do+you+scan+on+a+hp+deskjet+2541 PDF link annotation
    • http://digitalcalakk1.xyz/why_captive_prince_is_problematichspzn.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/PjfXiaJ/space_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/irhiuha/97920047657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6014ab16e8816.pdfIn PDF document text
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/forodivujimujo.pdfIn PDF document text
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/paziz-sekofap.pdfIn PDF document text
    • http://physcoo.com/cmake_tutorialmo71s.pdfIn PDF document text
    • http://djami.ru/trombosis_mesenterica_sintomas_y_signosp78q8.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/6jajfja/kipipopadopadafukabater.pdfIn PDF document text
    • https://xizikako.weebly.com/uploads/1/3/0/9/130969027/6308305.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/c0ROCw6/38481400132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fc7e0a7c6dd6.pdfIn PDF document text
    • http://fringigejy.site/where_to_purchase_singer_4423_sewing_machinejt7xm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_5fe183299365b.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
    • https://s3.amazonaws.com/kifutizijebuj/xafaritojivajeterufoso.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/missguided_discount_code_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/77275825199.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/lagu_bunga_citra_lestari_kuasamu.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/luxopozetab.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/lab_report_density_accuracy_and_precision.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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 5560 bytes
SHA-256: 72f1c2aaac4d76547191c7007776303418194bceeee809c3e4237d4cc2a1502b
font_01_sfnt_off0000f23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 10268 bytes
SHA-256: f938d613b3d7c52e20c622c7bdba099c9d7abc8b2b809bf88db72bd19e021a78
font_02_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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