Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97fc1b88814dbd3…

MALICIOUS

PDF

77.9 KB Created: 2021-03-02 14:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b100e150e13c4a30aea73d5a4141ba1 SHA-1: 4a38650c0ef363557cf00029d38e1e0ea337b95a SHA-256: d97fc1b88814dbd394bf3cdf7db363b07ff5069abbecfd9be011746d45b616bf
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or suspicious domains, indicating a phishing or scam attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely intended to deliver further malware or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://yafferge.ru/123?utm_term=2003+harley+sportster+1200+owners+manual In PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/explain_the_effect_of_germination_vs_non_germination_on_pea_seed_respiration.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485799/normal_5fe2dde4e276b.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/sifafupekibowarokepadin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_6037c79a46378.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/karegurafaz.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/557a02a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497131/normal_5feebb9848c2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449974/normal_5fcaaf4541a2d.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/7963168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fcceaab1ea77.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/sudevejerifu/perajowiwefuted.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/blinded_by_the_light_song.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/wenedisexuzowu.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/asus_m5a97_le_r2.0_motherboard_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/alfajr_clock_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/avanza_veloz_2014_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/nukaxaziludulepilol.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/hot_springs_grandee_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/liwozumipebaxe.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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5484 bytes
SHA-256: a7f338ddc6a7ef87ffbba95aa100fd5b4e2ada3e655ebda99c8238c85f76706b
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 11124 bytes
SHA-256: a7b7a68ec56c2f588eae0801e9201f8cfc4213c890b0bf656bcd62937d6c8cd2
font_02_sfnt_off00011be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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