Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae76d2f3bd9ffde…

MALICIOUS

PDF

75.0 KB Created: 2021-03-23 11:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ece9a465a86aaccb526935dcb51ca2a SHA-1: de1410f1600866e9f6a35437d79a09bac4829783 SHA-256: fae76d2f3bd9ffdeb347dbd0a1af489f9e1597b5504374a55f09c346bd302c8a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=gy+61+accelerometer+datasheet
    • http://rent-nout.site/78025464592uy61.pdf
    • http://cloudplay.xyz/93467683234wvkqi.pdf
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/5065180.pdf
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/besolopexafiv-medoteka-faxupomutowerej.pdf
    • https://falijufik.weebly.com/uploads/1/3/5/3/135349852/7768379.pdf
    • http://merovew.xyz/free_anti_virus_for_android_mobile5h9fc.pdf
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/tudarovedikil.pdf
    • http://rukozhop-guide.com/area_2_police_station_st_mary_contact_numberfxvd8.pdf
    • http://mgacessoria.online/playable_races_warhammer_total_war_2om0yx.pdf
    • https://vogexuweju.weebly.com/uploads/1/3/0/9/130969932/5175073.pdf
    • http://igme.site/86836821329ufggc.pdf
    • http://lotto-investclub.com/latest_movies_tamil_20192uolg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6abe3b76-d833-4b41-b6d4-8cea66461810/kojixexisolunevuwulizibas.pdf
    • https://uploads.strikinglycdn.com/files/b33b5d0f-de68-4a30-bfa0-101cf2118124/what_common_food_items_have_gluten.pdf
    • https://uploads.strikinglycdn.com/files/dbc05e3d-acfe-416e-8c62-75ee6bc01541/annabel_lee_meaning_by_stanza.pdf
    • https://s3.amazonaws.com/jeponowon/wuxularalitakaxixibafo.pdf
    • https://s3.amazonaws.com/jemisajoda/subtracting_fractions_with_different_denominators_worksheet_ks2.pdf
    • http://tuzugewidided.rf.gd/vidmate_apk_hd_video_er_2._42.pdf
    • https://uploads.strikinglycdn.com/files/01ce1356-f27e-4400-bc59-0396bef9f17e/viper_3305v_alarm.pdf
    • http://bibikefogive.epizy.com/kilogetajutupiv.pdf
    • https://s3.amazonaws.com/tevomenil/kijulesimobipe.pdf
    • https://uploads.strikinglycdn.com/files/406b06cf-d1e4-4823-bd77-af3a978226b7/givinixuzag.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7eb.bin
feec78650dac3561e751cb03e2e8f6e8482e7e8b83df44fac48dfc55c60eb8ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 5516 bytes
font_01_sfnt_off0000fa90.bin
f7f429d0992fbab75212a607eaa4348db3661ae647faa309f51747db303bddd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 10512 bytes

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