Malicious PDF — malware analysis report

Static analysis result for SHA-256 8712bc443ee8a0da…

MALICIOUS

PDF

146.1 KB Created: 2021-03-28 02:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e6f97e14b6fff05a7767975826d67681 SHA-1: c57fde323dc79768c45ef541f9f1a4c47099b881 SHA-256: 8712bc443ee8a0dae5afe007eaab6258ccd8ad65889242cf89228dc4cee403fb
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains links to known malicious redirectors, specifically `https://yafferge.ru/award?keyword=schindler+s+list+full+book+pdf`, which is used as a lure for free downloads. The presence of these links suggests an attempt to direct the user to a phishing or malware distribution site, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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/award?keyword=schindler+s+list+full+book+pdf In PDF document text
    • http://techanomic.com/26433552798zn7ob.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/jghahjs/how_to_change_my_voicemail_on_iphone_11.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/hgcoeif/hopper_recipe_minecraft_1._10.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/9ahcOgi/pancake_maker_pan_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jfW0jdH/85567391516.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavazer/icRjjFY/93320555818.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/S3oic8z/82372266704.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/jpieraf/1671200010.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/aXQhheU/35004044115.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/hdhgTji/marco_s_pizza_coupons.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/ffQshcW/dawiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/RvSjhha/buduzupejolikipareniwiki.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/Rhhjgdk/texas_holdem_poker_hands_odds.pdfIn PDF document text
    • http://world-wildshop.com/21836047087e0rkp.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/juwofuxufijup/19552700769.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/medicare_levy_exemption_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/lagu_hanya_rindu_cover_tival.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/dell_latitude_e6540_usb_3.0_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/68292939258.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_off0001eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB52 5340 bytes
SHA-256: 2b03dd2e265533e8838b686bee306923672c0aae421b5a92da9f9cee1f7876f7
font_01_sfnt_off0001fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD75 27400 bytes
SHA-256: e5e77fcf77e624380158441aca837343d2edcb98a25c96e920cbf427f38d6167

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