Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3db9b451b596387…

MALICIOUS

PDF

67.4 KB Created: 2021-03-16 15:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5fc9ca6831d6e8427a575d1fc1e7a0b1 SHA-1: a9eaef7cf497f5ab20eaac444d1fee8d03770a45 SHA-256: a3db9b451b5963877bdf09a11eadbbe9e539985e0f317d2a4cf4d2c586f72160
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://bologen.ru/award?keyword=aditi+singhal+books+pdf PDF link annotation
    • https://cdn.sqhk.co/xubipoxeguza/aijNJhW/eikoh_child_care_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5fe41bab60293.pdfIn PDF document text
    • https://sojuvamufivuleb.weebly.com/uploads/1/3/0/8/130874470/gezizopusabexat_selizevoresefap_wigona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6009e32479d5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_601bd07b65b4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_6020f8fb616e8.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/2b823a9af83b052.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/oyRDcgi/21173589459.pdfIn PDF document text
    • http://rajizaloka.iblogger.org/orthographic_projection_in_engineering_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/hjijjia/neha_kakkar_songs_album_youtube.pdfIn PDF document text
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/nidasifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fe9e004cab8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/open_puzzle_box_level_24_answer.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_44af7d6cf779473fb274b0bfdeafdff4.pdf?index=trueIn PDF document text
    • http://ragidunu.rf.gd/segowedigej.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_01ec74af2f6a4d2f94dda21c3c59d82f.pdf?index=trueIn PDF document text
    • http://fevejalamozek.epizy.com/g._p._s._c_full_form.pdfIn PDF document text
    • http://puvafimawebeka.epizy.com/vepup.pdfIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_9bdb3abb9d7b4c06ba991441b99b40df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/game_naruto_online_apk_android.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_6673d6d994be49f0a82502ed00e41141.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/2478063285.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 5400 bytes
SHA-256: 74661c91195505c2bde639d9eba29cee96e49c8a58046ae35db284cc1a1215d9
font_01_sfnt_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 10808 bytes
SHA-256: 0c9ab06c393febcc2c561a7c81615c026d5cdc84eeae90b2d030b2604b26e9c9

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