Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc01634b5d26f6f7…

MALICIOUS

PDF

80.4 KB Created: 2021-03-25 14:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 677b2a89e6d11797f05e86935e0047ec SHA-1: 8ef6934c7c3bc6fc1d07477e944d7c67ef19fee7 SHA-256: fc01634b5d26f6f7c947a404dd8eacebfaef9c775c9cdfdb1cc6c51f73f0c9e2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The primary URL observed is https://jottigo.ru/wix?keyword=manga+guide+to+biochemistry+pdf, which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=manga+guide+to+biochemistry+pdf PDF link annotation
    • https://zepusarogetiki.weebly.com/uploads/1/3/4/6/134687077/8aefc09cf3.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/lureninudidas-fiparorokawefoz-mekoginewum-popobawugizeke.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/196cf.pdfIn PDF document text
    • https://palelajasirele.weebly.com/uploads/1/3/5/3/135311742/wobine_refupesonumivus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_c7c061ed7173470eafa056882b3cf7e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee05b352-ca56-49b7-9ba6-fb52bf629c51/how_much_does_a_pole_vaulter_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2db56f8-3549-4be9-a0ee-a18c6a2890e9/epson_artisan_800_ink_pads.pdfIn PDF document text
    • http://fupofew.epizy.com/descargar_alto_s_adventure_para_android.pdfIn PDF document text
    • http://pisumapopub.rf.gd/rurebo.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/75114551966.pdfIn PDF document text
    • http://guxovoxed.rf.gd/linux_operating_system_list_2020.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_b695160ec62e4bb99ec310dae8eb329a.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_e5f87065906949bd8657fe001b5d8057.pdf?index=trueIn PDF document text
    • http://zuzogit.rf.gd/cannery_row_john_steinbeck_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/after_the_sunset_movie_in_tamil.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_4e90046c8b18426ca2227990e790f0dc.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_21e1808265af464b8fb3a28528832a96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b860e4c-a86a-4050-8206-d193e690d8af/what_is_the_dash_diet_for_weight_loss.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_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 5784 bytes
SHA-256: bb8c89b58715486f5c6f607758c9213203e12aa85b01bec25df0dac158023f13
font_01_sfnt_off00010aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 11772 bytes
SHA-256: d29a39a76a6c60449c6a28d523180fd3020d8c25748d00cb59a066940e39fd4c

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