Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f7cafe8225d811…

MALICIOUS

PDF

71.1 KB Created: 2021-03-24 12:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 480c1f6fce938907444f80054fde6e60 SHA-1: 545421d4c89986059fafe1c8798c7e3bb683c04b SHA-256: 80f7cafe8225d811c53db587810c3e70705611c8c9becff7cb61a234573892b9
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. The embedded URLs are likely used to redirect victims to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/award?keyword=biochemistry+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393035/normal_602a1e281bd48.pdfIn PDF document text
    • http://nalomojup.22web.org/gmat_analytical_reasoning_questions_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fc745995382d.pdfIn PDF document text
    • http://vodigonujeviji.iblogger.org/5763879447.pdfIn PDF document text
    • http://byseles.xyz/nature_wallpaper_hd_for_mobilee1644.pdfIn PDF document text
    • http://itgermany.net/5744906409d26yh.pdfIn PDF document text
    • http://ebay-coupon.ru/cabbage_farminghhqng.pdfIn PDF document text
    • http://3gusevshop.website/275856916246skf7.pdfIn PDF document text
    • http://study-english-05.site/iliad_full_text_onlinez5e1x.pdfIn PDF document text
    • http://raladotid.22web.org/5340839780.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_af6e8fca67be4c05bfa27ef4819d7978.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b395f26-dd98-480b-9727-cb6cb13835ca/goal_setting_worksheet_for_students.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_dcc3280abf6448c8a95aa4163e666dcb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25045d7a-f592-4152-bddc-dedd5643733f/7835715609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37668567-26a2-4260-a85d-e78957da0e35/best_foods_to_eat_on_alkaline_diet.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_a0fdfc07918341258bba7b686bf9a965.pdf?index=trueIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_95c1e9a1a3b64d69a90d90320a3a027b.pdf?index=trueIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_67d58913668b48699d398fa0f693da89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5876762-6bcb-4856-80ce-e997282bd4be/sole_e35_elliptical_price_in_pakistan.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_1470a8f40310404b83a136f5884ee703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e69c637-a7f9-4dc8-83b1-213823588455/jvc_kd_r320_manual.pdfIn PDF document text
    • http://sinizanuj.epizy.com/fekivinadukoba.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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 5640 bytes
SHA-256: 69c54a542747c857c468bf6de87457acc58e7eac5c3fc58756dfa41670cdd037
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10100 bytes
SHA-256: 0412e5a1d4c0c72ec202b2cf9bbbce54e56cc95c901bff2aa2c6176e1363a3fb