Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5412b7c846ffea5…

MALICIOUS

PDF

74.6 KB Created: 2020-11-19 07:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa4d597a0f31a564ba7ec8085dd67dd5 SHA-1: d7f5d6d836bfe3cd0c06622c12143709c035c885 SHA-256: a5412b7c846ffea50b4779622fcf552b32f516cb6b42b938406ba3d589aee08a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=fresh+fruit+broken+bodies+summary PDF link annotation
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/zakolufudu-sodajupekiwa.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/02b325aa1b6e.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://uploads.strikinglycdn.com/files/de1905f7-f512-4527-9311-31153e9b2545/baking_and_pastry_mastering_the_art_and_craft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83f1fd1-a56a-4b53-a3b6-ca98c257afd8/sz_sanatlar_benzetme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860cd728-83a6-41af-a97d-2f22690eb46f/skyrim_sassy_teen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9e715c-75e5-48c8-bd68-4532e4d164dc/ruwijoriwaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a778f59f-5c51-4886-9868-2a950e4fb65a/41666136842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383d9229-f106-4660-af78-8409db18f7d1/51767878063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d4cda6-e2b5-4d58-9d68-4d22d98fbd7e/79708138832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273084cd-bc2c-4a49-a2d1-3b2879a7ca81/hamilton_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/fewawaditimupinumusibiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/advanced_information_technology_public_company_limited_ait.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0796217a-c742-4e4d-a879-68d045e328a5/21535271198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58beaca7-7dcf-4e18-b88a-f84a2cbb7b2d/91058761209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583a6da0-0205-4e85-9156-14135e2f30ee/fiperunuwilisekinanava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7715a5a-e20b-49a3-9993-4fec2edaccb6/37067930322.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 5256 bytes
SHA-256: 54da51652c67464cdedcc5938a44800d2d6ec4302f9327967b65cd16018ffad4
font_01_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 10792 bytes
SHA-256: 177379a41e7ed0920af3cc2189bf686390c3c4427a6b399480473240e5d33773
font_02_sfnt_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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