Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb9a1d2e38ac39f…

MALICIOUS

PDF

75.2 KB Created: 2021-04-04 08:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0a5296cfa4a8ca763de63cb76110a8a SHA-1: 8b9210fd53581bb30c7d9bde1d3cbce1385930bc SHA-256: aeb9a1d2e38ac39fa30d3349e2ca3b381c2d21e4dc734c4f01a75b6e5c14053b
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 0.9998

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 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/award?keyword=bergey+s+manual+ninth+edition+pdf PDF link annotation
    • https://lamixanusagexog.weebly.com/uploads/1/3/5/3/135317293/terepi.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/halo_effect_psychology.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/kupiwexinupiv_togarezupupeb_nuxazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_603f7cf9efc7c.pdfIn PDF document text
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/zexufapoponudad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413838/normal_6008931f737ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488580/normal_5fd274d0423d4.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/lewis_sperry_chafer_systematic_theology_free.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/309b6cd5-7e93-4d16-acac-ce80afa2acc7/70271528468.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/calculating_probability_in_excel_with_mean_and_standard_deviation.pdfIn PDF document text
    • http://kesojavutuv.epizy.com/what_are_the_good_values_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/what_is_turning_in_manufacturing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/turosoborewipiwukabasagil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40da15da-9913-4016-af7d-2e4a27579475/flowchart_proof_calculator.pdfIn PDF document text
    • http://tegikemi.rf.gd/e_way_bill_sample.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/dusigebepapejufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e428c7-7364-4897-ab50-d8908f9fd248/the_white_tiger_2021_full_movie_online_watch.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/action_research_planner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6483512-a1f4-40b3-8ba7-e80e259c0bde/the_dark_knight_returns_part_1_espaol_latino.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 5604 bytes
SHA-256: 6da871c23217f7a27f9c59aa51ecad2f330dde77ef44bbbcf491120454b92fee
font_01_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 10080 bytes
SHA-256: c5fe597e97f038f1a002e6237359521692ab2adec5c1e78d8308d89a61d04486
font_02_sfnt_off00010a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A04 16136 bytes
SHA-256: 8d0ca5441952925faa6f68d28470995fcd5e3edd800b1977fac83179433ae1db

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