Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bed872629ad5ad4…

MALICIOUS

PDF

72.8 KB Created: 2021-03-05 23:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 26dc08d781112c2fe9880d4d667433b8 SHA-1: b57eb1305e231fe2ecacdc7d9cc90a955387178d SHA-256: 0bed872629ad5ad42a36d54ccc7b1fa8fd6fdcf2ebee37fa9d30ec4c28225113
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a high-confidence ML classification indicating maliciousness and includes heuristics pointing to an SEO redirector link. This link, 'https://pelibifir.ru/wix?keyword=gps+status+%2526+toolbox+pro+apk+2019', is presented as a lure for free software, which is a common phishing tactic. The document's structure and embedded URLs suggest an attempt to trick users into downloading malicious or unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/wix?keyword=gps+status+%2526+toolbox+pro+apk+2019 PDF link annotation
    • http://islemleriniz.org/27393889101me92k.pdfIn PDF document text
    • http://ejinaya.com/love_ni_bhavai_watch_online_free_movievne1d.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/why_does_my_washer_leak_when_it_spins.pdfIn PDF document text
    • http://vafijevimam.iblogger.org/15237426438.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/2500_in_1960.pdfIn PDF document text
    • http://probmaka.tech/21100402513ieg4f.pdfIn PDF document text
    • http://taygerr.com/jack_lalannes_power_juicer_express_priceoardq.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/what_medication_is_good_for_period_cramps.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/jolituzoji/soft_corporate_offer_template.pdfIn PDF document text
    • http://vefejabenu.rf.gd/what_is_the_best_battery_weed_trimmer_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/mudoxekula.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/23123124998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3697b774-2641-4c30-ab2f-e890114ea926/60280510076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912a4d76-4cac-4b3e-973c-7da5a256c1ea/everybody_wants_to_be_a_cat_flute_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d69531-dc7e-40b9-a0c7-d4cc1c48b98b/simplicity_riding_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/thousand_songs_of_milarepa.pdfIn PDF document text
    • http://vufudaz.rf.gd/monstrosity_meaning_oxford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35462f0f-200d-44ad-90bb-2dcc1902adc2/2014591030.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/18360373473.pdfIn PDF document text
    • http://fuzazoxavuvuw.rf.gd/95912956236.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/corki_arurf_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 4716 bytes
SHA-256: d46ec41b226658698a7f1221829f408ecd5fc4372f40a99710413dbc67fa19a9
font_01_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 10616 bytes
SHA-256: 8b4276962c9e1fa962452ae970cfe8c8daa4ec585911c6f40a54243bbcdef7f1

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