Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac1619841161eef…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 20:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a73fb7a646b09d672c943e0d0612d3c9 SHA-1: cb38d29f89626521600cc3802d614c81084dd9b0 SHA-256: 6ac1619841161eeffd499d038ab1934a0b88613ed53913fbe9b1382ceffd0775
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to acne scar removal, which redirects to a suspicious URL. This URL is identified as a potential phishing or malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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://seumenha.ru/strik?utm_term=how+to+get+rid+of+small+acne+scars+on+forehead PDF link annotation
    • https://cdn.sqhk.co/tibakekavero/jhmIBxa/24942964271.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/riffhdZ/sedab.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/dUhjhgN/26389571615.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/3jiuYhg/how_to_cook_thin_pork_chops_bone_in.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/ijfifhf/46190754782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibamifa.rf.gd/basics_of_cyber_security.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/vofasezuneve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbdbdca-a950-47f2-a2bb-d8debbda5fcb/medofeg.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/loputedog.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/profit_and_loss_template_monthly.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/apple_wallet_app_ipad.pdfIn PDF document text
    • http://fafezevasuba.rf.gd/famodavokef.pdfIn PDF document text
    • http://maxegore.epizy.com/texas_defensive_driving_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/25307927125.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/wudadew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138bb9e7-7884-4d04-bf41-11c87f9352be/51397010042.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/how_to_fix_e3_error_in_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/30932849555.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/32259385544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2619abad-7ac8-44ec-9751-6e68b3d31089/technics_sl-d202_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a0d537-af24-41c3-9bf9-90ca9177e76d/posie_libert_paul_eluard_youtube.pdfIn PDF document text
    • http://rokumezex.epizy.com/sunbeam_cool_mist_humidifier_filter_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/nelizuvejadosibebaranor.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/dalobuwipofedose.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/creed_ii_imdb_parents_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_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 5488 bytes
SHA-256: e41ae711f0c21d5069f03c272aa01a0e3d3f36fe4fa585f45bbf15212de289e0
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 11340 bytes
SHA-256: d427ec5457301cd534dffeab819cd09834ecb30dbf79f7aaaf83b4a3eb26b592