Malicious PDF — malware analysis report

Static analysis result for SHA-256 034c1f224611b245…

MALICIOUS

PDF

158.5 KB Created: 2021-03-31 05:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1c9524f44dfcfe4e2e1089acbd4dbfe2 SHA-1: 51f3548cd345878115fffb569576d098c395feb1 SHA-256: 034c1f224611b2459151eeeb27f9652066b478b33fc96581a0523dd0c3946450
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://leonvi.ru/wix?keyword=human+impact+on+savanna+biome PDF link annotation
    • http://lokotahas.ru/zesunesigf0p2i.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/jeO0jaQ/funny_gifs_for_kids.pdfIn PDF document text
    • http://deflecfcvy.best/what_are_the_95_theses_that_martin_luther_wrote7s60x.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/50QOHJz/gunshot_wound_to_back_of_head_icd_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/xidPheB/wewodizoj.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/diaU1Zg/72877663047.pdfIn PDF document text
    • http://netzamka.ru/ghost_rider_3d_hack_apkclkz1.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/tetonesez-kaniveduvotakuj.pdfIn PDF document text
    • https://pogerukafitili.weebly.com/uploads/1/3/1/4/131437037/nujarefovid.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/mjgTSii/72260329318.pdfIn PDF document text
    • http://maddot.space/apprendre_portugais_prononciationrwre6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b103e22-ff62-48e7-9a1e-7a46b2da1d1c/maggie_a_girl_of_the_streets_chapter_14_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c868ff4-78e3-49b0-9d4b-99f7eb38dc72/doctors_who_do_house_calls_sydney.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/40173837983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430aa5ec-8729-4602-9104-4a951e8f794e/vizio_m50-c1_black_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10923b02-b12f-4a36-a00e-46ad09bef7fc/40391153204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e1b2b3-ed0e-42b8-8856-4ecfd09c6bfc/bible_commentary_matthew_8_28-34.pdfIn PDF document text
    • http://xatofobimuxu.rf.gd/repewiwukewax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00021b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B11 5112 bytes
SHA-256: 845f09644f575853fb4bdd14e8ff04ac955bf4008a1e940eaee50bda22c4ddc7
font_01_sfnt_off00022c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C5F 12852 bytes
SHA-256: 64a08461bd991880897c38fdccf9fce53dda439b36c3482882d5a89a8f313277
font_02_sfnt_off000255e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x255E6 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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