Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a7e00b870de0c5…

MALICIOUS

PDF

76.2 KB Created: 2021-05-13 22:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 11f331ca6f526378592f949a193c2a8d SHA-1: 2b24ce03cf283a0ea5d460b9dcb20221e1f42a51 SHA-256: 99a7e00b870de0c56d78e47f545fe4318dbc0a4cdf9019550f1ca9aaaed8a79e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'praise and worship songs' which redirects to a URL containing a similar term. This suggests a phishing campaign aiming to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=best+praise+and+worship+songs+2020 PDF link annotation
    • https://tusagenitig.weebly.com/uploads/1/3/1/4/131452801/kifivuvi-dawovebituremig-jopinodi-gawupomagoto.pdfIn PDF document text
    • http://health-top.ru/inside_reading_2_second_edition6f6fg.pdfIn PDF document text
    • http://rabota-plus.club/45461673834qs1th.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/24374189001.pdfIn PDF document text
    • https://fupelesanu.weebly.com/uploads/1/3/1/6/131606305/22792c5.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/lutel.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/does_walmart_sell_hearing_aid_batteries.pdfIn PDF document text
    • http://tibetterrier.ru/dirixoni73fhi.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/92d33dfca.pdfIn PDF document text
    • http://bisewilorilamej.sportsontheweb.net/57470777419.pdfIn PDF document text
    • http://dekovag.mypressonline.com/68812868966.pdfIn PDF document text
    • http://asia.kiwi/dakunifaknzsr.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/3db8181e806078e.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/87b9e3c5-9cc3-4c0b-9faa-1ff7e12e4a2d/manupajukulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b548103e-316a-4938-8d03-3352f436b708/zupode.pdfIn PDF document text
    • http://kelawezup.rf.gd/moments_choose_your_story_apk.pdfIn PDF document text
    • http://kakapefetabol.rf.gd/reflection_refraction_diffraction_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267404d4-34aa-4191-bd35-6c5b683e5a48/ps4_gold_headset_companion_app_pc.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_fe9eabc13e334b949ea0b80311339133.pdf?index=trueIn PDF document text
    • http://punotonaduwize.atwebpages.com/back_exercises_sciatica.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_f4548378946a49f28f794da1b8d825d9.pdf?index=trueIn PDF document text
    • http://tonezifimoraga.epizy.com/xekojarazawoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823e1bad-25d9-4eeb-a544-7ae5526666a1/stock_for_dummies_reddit.pdfIn PDF document text
    • http://gaditimotef.rf.gd/binary_tree_in_data_structure_using_c.pdfIn PDF document text
    • http://lilobemo.epizy.com/baby_trend_sit_n_stand_double_stroller_replacement_parts.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 5604 bytes
SHA-256: bc73cee439f4be4b1e84f83feaefd0a294a2db27a83d413c26091603082f7419
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 10980 bytes
SHA-256: 3c7cf9a8b30c288e6e0492057c45c91c614231030b7bcaae6d0e6e71c60fa43d