Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdcceeb3aa45de5…

MALICIOUS

PDF

77.6 KB Created: 2021-04-01 17:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 886954d395ffc9a4160ff78cc25eaef2 SHA-1: 57afde9f08e477b92567ca0b41c5d050aa181056 SHA-256: 4cdcceeb3aa45de566fedfb9e219b0a2306f9533d869a5721a277b9c9313243e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://nipisod.ru/wix?keyword=bcps+2019+to+2020+calendar PDF link annotation
    • http://alex-travel.moscow/anabaptist_vs_reformedfolvt.pdfIn PDF document text
    • http://straponartist.com/is_501c6_tax_exemptu0ocl.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/ejfbGYc/pba_tour_schedule_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/sJbjbZR/pocket_rally_game_free_download.pdfIn PDF document text
    • http://dvertsoff.ru/wwe_raw_bleacher_report_live4mtne.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/gidiex8/crystal_island_wyvern_eggs.pdfIn PDF document text
    • http://1gusevshop.space/char-broil_grills_deluxe_digital_electric_smoker_7256rkp1.pdfIn PDF document text
    • http://xrootunited.com/wordly_wise_book_1ec82e.pdfIn PDF document text
    • http://cosmeteca.com/994601984209bxnd.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/iIhejdL/happy_birthday_blue_balloons_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/gjjcaja/minicraft_plus_github.pdfIn PDF document text
    • http://rubeatyshop.xyz/complete_gba_rom_set5u2ry.pdfIn PDF document text
    • http://milanomodaitaly.site/quickbooks_2019_cheat_sheetfw99k.pdfIn PDF document text
    • http://apeech.ru/pawejifijemoxukegvc6.pdfIn PDF document text
    • http://alfa-quest.ru/my_mtn_ghana_app_apkpgvmr.pdfIn PDF document text
    • http://instapresent.site/rajuluxu9f19u.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/227fac0c-fcf9-4b2a-baa0-a77841744bca/savagamezuj.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/76391674035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fc7e27-652a-4d05-a9dc-d5f89bebfdf5/how_many_carbs_in_a_chicken_taco_salad_from_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d7cbaa-6b0b-42f2-9d45-a2f8786c6e80/24666890198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ab15f9-dc9c-4fa1-9982-228bcfb4c50f/nasuzuzovur.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/ankle_osteoarthritis_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/xenusukuk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 5596 bytes
SHA-256: 1beca8a0a060cfb227b06a2ee81e87fc91c8c8cac5f0bc107713989d29a7d1fa
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 11296 bytes
SHA-256: 5b1f3891c582982ad5598dc93b59ffc1ab5e9233c9f7a54ca0e72a968a353eb9

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