Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a97db60abf962d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-18 03:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ab61ca8ddeb83e5064fd9fa6943bbc SHA-1: 5845c3e9cf416b68107ce016aceed71ed69cb946 SHA-256: 41a97db60abf962d1687b305a828641b5964478ed5ef48f24df6d60bb4cc7aca
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised with search terms related to appliance problems. While no scripts were explicitly extracted, the PDF structure and the presence of external URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=maytag+gemini+electric+double+oven+problems
    • https://cdn.sqhk.co/sugezigo/AJ2jcif/gopabufitalazapo.pdf
    • http://nomudepalak.medianewsonline.com/split_mac_online.pdf
    • http://lagegisujego.iblogger.org/world_countries_and_capitals_in_tamil.pdf
    • http://nazhivy.net/539677698278osdl.pdf
    • http://wirelessinfo.ru/the_factory_kitchen_los_angeles_caw7jiq.pdf
    • http://xuvepawa.iblogger.org/wireless_ip_camera_setup_guide.pdf
    • http://xufaroruguvotel.iblogger.org/nagumugajoletawopotomova.pdf
    • http://nogurufegu.mygamesonline.org/atari_flashback_7_power_supply.pdf
    • http://xusonawifofi.iblogger.org/55915638145.pdf
    • https://cdn.sqhk.co/fapolokid/lBU6ieF/ninja_kitty_online_game.pdf
    • http://e-devletodeme.net/61396426392u5o2t.pdf
    • https://cdn.sqhk.co/rufosopufu/iejhieU/damirudelavul.pdf
    • http://wijetaz.mypressonline.com/femavesijafabusoridemaw.pdf
    • http://pejofewetoz.22web.org/displacement_and_distance_worksheet_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nazonuretowu.epizy.com/squarespace_templates_for_bloggers.pdf
    • https://s3.amazonaws.com/nokiva/laptop_best_buy_guide_juni_2019.pdf
    • http://nusavigosewu.epizy.com/bittersweet_sarah_ockler.pdf
    • https://s3.amazonaws.com/desenaz/zedezozozagebetikixa.pdf
    • http://wixesikive.epizy.com/samuel_beckett_waiting_for_godot_download.pdf
    • https://s3.amazonaws.com/vutame/easy_pop_songs_piano_sheet_music_free.pdf
    • https://s3.amazonaws.com/wewuxuviwar/sojirozipiraduzaxef.pdf
    • http://romofimor.onlinewebshop.net/4830724047.pdf
    • http://nixikoko.epizy.com/17173550413.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_off000101f8.bin
dbafd01acfe030de422d34c42cc6bfeb276ba3b4949e73b6c197329c4808f000
pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 5700 bytes
font_01_sfnt_off00011564.bin
5d19c05e1f8eb8e069cf25eab1d79891bebef46f1071f935cf79c42cdbefd5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 10636 bytes