Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f3d35ebef6a09a…

MALICIOUS

PDF

80.9 KB Created: 2021-03-27 17:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 878708a200870a2fe7adec55035b68f2 SHA-1: 5a4dd0cc7f7d5a47846f3faa04a024a4c5e92411 SHA-256: 85f3d35ebef6a09aea7242640387e4f8ba051bbfa1a238da5deeeaa485efc2c3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=don%2527+t+starve+together+wurt+guide In PDF document text
    • http://ladunosim.sportsontheweb.net/download_cecil_medicine.pdfIn PDF document text
    • https://bunepefetupudir.weebly.com/uploads/1/3/2/7/132741430/loxezi-digofosit-mizizinakuw-wulupa.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/jezup.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/ponogad.pdfIn PDF document text
    • http://bumalutaf.iblogger.org/record_video_screenshot_android.pdfIn PDF document text
    • http://musemumazizer.22web.org/how_to_connect_rca_sound_bar_to_tv.pdfIn PDF document text
    • http://dexizixefufene.iblogger.org/over_the_rainbow_lyrics_meaning.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://uploads.strikinglycdn.com/files/b9453ef1-38b5-4aed-8a46-f7f33af026f5/71023759046.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/how_to_draw_anime_characters_full_body.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/classification_bethesda_2014.pdfIn PDF document text
    • http://dabesajunelazul.rf.gd/13334504912.pdfIn PDF document text
    • http://mijemem.rf.gd/arupu_song_lyrics.pdfIn PDF document text
    • http://felepukagerek.epizy.com/93047407351.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/59697040021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d16244a-086f-43d3-b09b-3b0e89c1b56e/femofu.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/19272339337.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/zorivamenuxexumobi.pdfIn PDF document text
    • http://zutadefado.epizy.com/why_is_my_2007_chevy_equinox_overheating.pdfIn PDF document text
    • http://famuxigoram.epizy.com/silupumujake.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/63377212456.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/babybjorn_bouncer_balance_soft_vs_bliss.pdfIn PDF document text
    • http://gotuziput.epizy.com/ctet_answer_key.pdfIn PDF document text
    • http://tokozod.myartsonline.com/35145313632.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_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 5124 bytes
SHA-256: 5b30dbe56bbf35fff60485204f5dad997be76dfb19230debfa64a3a3898308f2
font_01_sfnt_off0001017f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 10780 bytes
SHA-256: 140c33519c33ffdd6de817c4a6c6912ca979ed9775837372f1840c8f359c6cc1
font_02_sfnt_off00012666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.