Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5288bc9fa2a25e7…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 11:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 068eac35b5b68980cf79a1e9dc976ee6 SHA-1: e9ec5a08c9bbb51a5e21a8f3e367e50efc5e7c4f SHA-256: c5288bc9fa2a25e757c5912868ff33dd26ab06e7c4a90f34dc2fc817805d2c9b
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the true destination or distribute malware. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=pokemon+fire+emerald+rom PDF link annotation
    • https://zegarujavo.weebly.com/uploads/1/3/4/6/134667802/f65882fb5c.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/cjcoigJ/vlc_video_player_download_for_android.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/zokovowukujoporawekuwupaj.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/eOjh1ie/ludo_game_super_ludo_online_2020_gameplay.pdfIn PDF document text
    • https://vajinivokesele.weebly.com/uploads/1/3/5/3/135326698/ab81e47a9a.pdfIn PDF document text
    • https://mevuzujalojidid.weebly.com/uploads/1/3/4/5/134598641/ba95fdb82c7b802.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_transfer_a_game_to_another_ps4_account.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/how_to_make_a_soccer_training_program.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/hbhizhj/nostalgia_popcorn_maker_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/wevodapobu/DjfhjgQ/offline_games_free_download_for_pc_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/hbmd4ja/livivosedosef.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://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_ed6b0816058440d08ff0ee958515909b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lefemijip/lorraine_lea_linen_sheet_sets.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/50006771130.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_f1fb1c5d177a4f70a61fa1cf9f73a71a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemofodi/detetetapepuzelimemez.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/pirafodudemefoninufodazu.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_dfd5f67157bd4bfdbde4e718a7549c86.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_d7aefb18cfd64aa68ec9a24942296fb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/edgestar_ice_maker_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/78929676918.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_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 4648 bytes
SHA-256: 71771281f982cb89f4ab1c20d24b84c7135f98500684d78f752db66920bf1caa
font_01_sfnt_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 10704 bytes
SHA-256: 2e4c8fc15fa38ca9dcaf865b0c6b3e069ba9e1c3b71453310ca1c9c1752671cd
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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