Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ab758e31d9445a…

MALICIOUS

PDF

78.8 KB Created: 2021-02-28 16:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab6eb8acd306314d3c350f1413ae9ba3 SHA-1: 4905991756f946aa01e449fe2f5bd52e91282221 SHA-256: d5ab758e31d9445a3953f9259505bf93964b6b24e1ff7ea42da621dcbc7e1839
76 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URIs and suspicious links with invisible elements pointing to potentially harmful domains. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xezojetit.ru/wix?keyword=my+dear+boss+2+hacked
    • http://my-favshopc.online/king_lear_summary_act_4_scene_63zt7u.pdf
    • https://rilulozopofebu.weebly.com/uploads/1/3/1/4/131406258/zuxawali.pdf
    • https://cdn.sqhk.co/fofasafiwi/e8gg6UR/phoenix_suns_players_all_time.pdf
    • https://zetoruribafepa.weebly.com/uploads/1/3/1/4/131452904/6361948.pdf
    • http://techanomic.com/285846242869e88o.pdf
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/napuruzoxe-purevuna-zamevokunej.pdf
    • https://dariwatipizodaf.weebly.com/uploads/1/3/5/3/135323996/ee59782.pdf
    • http://ig-supportcenter.xyz/benedetta_porcaroli_net_worth3q2l0.pdf
    • http://wrinklestiltskin.com/chemistry_2019_answer_key_karnatakaa7mhv.pdf
    • http://steelsho3.club/mines_of_mars_scifi_mining_rpg_apk08j9r.pdf
    • https://cdn.sqhk.co/wepunajexiju/3khaGbk/gezabilubifed.pdf
    • http://shoplus.info/how_to_record_online_meeting_zoomu1k65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nosikugabuvisal.epizy.com/67469159263.pdf
    • https://s3.amazonaws.com/tuxexi/96055899043.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/media_player_update_for_windows_7.pdf
    • https://s3.amazonaws.com/fuvidokibet/samsung_sdr-b74301n_default_password.pdf
    • https://s3.amazonaws.com/jarirotexab/can_the_police_see_your_snapchat_messages.pdf
    • http://tikuvusupatel.rf.gd/is_it_spelt_or_spelled_yahoo_answers.pdf
    • http://nekijegaladozej.epizy.com/72387704752.pdf
    • https://s3.amazonaws.com/kakekojezutok/chrome_os_android_version.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_off0000f7c9.bin
2774d42acd54e1b5927658d505a6f78ca8e66efbb5ae20157dc9d872d9a15ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 5440 bytes
font_01_sfnt_off00010a53.bin
5ab737b3c29f9265f988b56881f2ccffc163f21f8e89e1ea280f8165d1467f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 10480 bytes