Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba12f5f6ee26c0e…

MALICIOUS

PDF

80.1 KB Created: 2021-01-29 11:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ac1d917a4e68e04b764c0ec1b3208f7 SHA-1: e1ffcea85f398c1fb70a6be7bc788f72901a2369 SHA-256: 1ba12f5f6ee26c0e6d5ec11cbb8b4450ceea1ea64685e3f1a20ca51de09e0828
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights the nature of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=analyzing+and+interpreting+scientific+data+packet+answers PDF link annotation
    • http://dusosax.66ghz.com/97763089796.pdfIn PDF document text
    • http://lunesygets.xyz/zotrvank_moment_zotrvanosti_kalkuufiz1.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/fsgmJia/tipurevanelajedodonitinok.pdfIn PDF document text
    • http://marketitaly.info/21061884350lxhog.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/YFid7yz/kiraw.pdfIn PDF document text
    • http://xovuwut.iblogger.org/62395857875.pdfIn PDF document text
    • http://rijupoxog.22web.org/43045350665.pdfIn PDF document text
    • http://dietnatur.fun/meme_sound_meme_soundboardxz013.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/hiahcVR/wooden_sofa_set_price_in_madurai.pdfIn PDF document text
    • http://testersairf.xyz/56770465132g4kjm.pdfIn PDF document text
    • http://pubggaming.online/reviso_bibliogrfica_metodologiarv9nt.pdfIn PDF document text
    • http://vquest.website/ruzetoxvfnis.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
    • http://zavivemigowoson.epizy.com/kazowinajukosi.pdfIn PDF document text
    • http://kubivakov.epizy.com/adding_and_subtracting_fractions_fun_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/40207932233.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/archaeologist_bard_guide_pathfinder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 5300 bytes
SHA-256: 6b59bbf10de1dbeac4bf4e5302e99cf11ae4427f6c8b03230081cdda2dde712f
font_01_sfnt_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 11832 bytes
SHA-256: e2c7380654b3ac26bffa6a92b538b9241a9daf7496344f5faca95687e10e4aba
font_02_sfnt_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.