Malicious PDF — malware analysis report

Static analysis result for SHA-256 35de6ee2af490e0a…

MALICIOUS

PDF

100.1 KB Created: 2021-03-18 22:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dd4cb1c9c7161cd60d757f2cc32beee6 SHA-1: 247f83b3b0a237212771d963a93a98012d6dfe37 SHA-256: 35de6ee2af490e0a45e5bd6bbf8d5cc1c224e79307082fc1c64ee12f385c1144
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDFs, indicating a link farm. The primary malicious URL is `https://baarspo.ru/award?keyword=sacrificial+anode+cathodic+protection+pdf`, which is likely used to distribute further malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/award?keyword=sacrificial+anode+cathodic+protection+pdf PDF link annotation
    • https://lewezuwarekizes.weebly.com/uploads/1/3/4/0/134040914/sumewodalo_mubifelofa_dowesozubedurex.pdfIn PDF document text
    • http://leon-stavki.info/u_verse_silver_remote_programmingrf8c9.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/58f2fab7.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/99880686774.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/3655e0960f5c07.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/when_did_the_canon_rebel_xt_come_outknqp3.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/11114985812.pdfIn PDF document text
    • http://relax35.ru/uniden_bearcat_bc125at_handheld_scanner._5003seqz.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/bevuz_vukesos_josifakun.pdfIn PDF document text
    • http://shothard.site/trade_marketing_manager_job_description70v71.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/buxibogutuloxukij.pdfIn PDF document text
    • http://uablog.website/how_to_clean_a_flame_sensor_on_a_coleman_furnacedv869.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://s3.amazonaws.com/gurupixabogivaz/tamasha_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/how_to_write_a_senior_farewell_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/ade_beimani_tu_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/any_video_converter_ultimate_full_crack.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/2275271855.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/big_bang_all_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/luwufivumisex.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/79356801782.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/2020803796.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/nakuweximifa.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/miui_10_android_9_mi6.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_off00013bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCE 4956 bytes
SHA-256: 084e3e873878480f16b761f6d1aaefa389a5df3b6bb4e5baca40870ba4c5f611
font_01_sfnt_off00014c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8C 11704 bytes
SHA-256: e74355091686e9e8489981f76c071b634d07f404b4e9aa894e1dfef43f1307b4
font_02_sfnt_off00017459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17459 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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