Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3ad750e3b4f341…

MALICIOUS

PDF

69.7 KB Created: 2021-04-05 23:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96e826a13087d7996af636b9b84dc408 SHA-1: 52b179766a594dd13642ba2b984dcdba9b26c890 SHA-256: cb3ad750e3b4f3414452757736ba16b78eea1cf11caffa22d6c79ee3c1e7c945
156 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. 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 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.
  • 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://midufefew.ru/strik?utm_term=acceleration+equations+worksheet PDF link annotation
    • http://bifarigudok.22web.org/kitchenaid_superba_refrigerator_water_filter_replacement.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/81648055351.pdfIn PDF document text
    • https://mefutegisudaxat.weebly.com/uploads/1/3/4/3/134350432/4464916.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/93498319880.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/7516545.pdfIn PDF document text
    • http://zogoxadaxagan.iblogger.org/sample_english_vocabulary_test_with_answers.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/29618175695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/filehippo_kaspersky_antivirus_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e934093-c21b-4296-a0a8-a806342cd4d5/tomb_of_the_triclinium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67288c5-c703-42b6-8ba0-bb87d00aad6c/lukelopan.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/zavigogujawuruga.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/reporting_generalized_linear_model_results_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/95440144111.pdfIn PDF document text
    • http://vixekufu.epizy.com/evh_5150_iii_50w_6l6_amplifier_head.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/nobudofiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e5ae53-e718-4b09-84e3-2a221a56084a/the_night_sky_picture_size.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/long_vowel_sounds_worksheets.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/73741034572.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/boxulegunurar.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/bbc_tv_series_war_and_peace_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/how_to_stop_a_sloan_flushmate_from_running.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/is_the_book_little_fires_everywhere_based_on_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369023ac-df4f-4f29-8b9e-bdec6b29f711/scag_tiger_cat_2_weight.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_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 5156 bytes
SHA-256: e34503836bc7c1f2c5a771652e479fc2c0ce761fe6d790abede3dac6b8d063f4
font_01_sfnt_off0000e49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49A 10800 bytes
SHA-256: 69aef64c9517c3c5b0efb674a12ce64a78f127b13a7fbbf19496b5f07fe1f4e4

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