Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e8e0d1b53e51d4…

MALICIOUS

PDF

78.2 KB Created: 2021-05-07 12:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 005ce155a53e3d2db5e5153f1a88aad0 SHA-1: e853222e4db05ebc672df895240dc3f3731a96b2 SHA-256: 03e8e0d1b53e51d4babf7db67a949a227755227b3dce55abccac1e76b8c91417
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its function as a link farm, directing users to multiple external websites. The document's content, though appearing innocuous, is a lure to disguise the malicious intent of redirecting users to potentially harmful infrastructure. The presence of numerous links to disposable hosting and redirector services strongly indicates a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=children%2527s+songs+guitar+tabs+pdf In PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/464069.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/batuniwid-gusikafe-nemobi.pdfIn PDF document text
    • http://gogejevi.iblogger.org/hot_song_bestwap.pdfIn PDF document text
    • http://m-laskin.ru/tonal_harmony_workbook_answers_chapter_70recm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5ffd11f0e6e84.pdfIn PDF document text
    • http://cmbespaceclient.xyz/666516061532cfwr.pdfIn PDF document text
    • https://wowutelugige.weebly.com/uploads/1/3/4/3/134359508/6949239.pdfIn PDF document text
    • http://ecoterritory.store/92499253997tszz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5febc0e72ae4c.pdfIn PDF document text
    • http://mipedinujit.22web.org/singer_fashion_mate_computerized_sewing_machine.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/botuk.pdfIn PDF document text
    • https://xorowime.weebly.com/uploads/1/3/5/3/135307705/zuvemejekadokixiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_600410839dbb2.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/785a808a177fe2.pdfIn PDF document text
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/2bba529867a62b.pdfIn PDF document text
    • https://gatixitawenubik.weebly.com/uploads/1/3/4/6/134643062/mijedasaterovavibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarunom.rf.gd/76042842429.pdfIn PDF document text
    • http://finimuzodorum.rf.gd/2116923622.pdfIn PDF document text
    • http://pawulufotes.epizy.com/auvio_wireless_earbuds_review.pdfIn PDF document text
    • http://keberugut.epizy.com/anycast_m2_plus__android.pdfIn PDF document text
    • http://zonezeg.rf.gd/zoxanajoxaramunulozut.pdfIn PDF document text
    • http://bujubumufeji.rf.gd/case_study_research_article.pdfIn PDF document text
    • http://fojofediwesifog.rf.gd/90033922718.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 3384 bytes
SHA-256: 070297463f9a59b56093f413db9182574a33c642f1da35b2f8dfa82844be622d
font_01_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5384 bytes
SHA-256: 0a5b5e017677f6ce0c8f82c454a85c2e780bd58f0e26116b2df862ad83a6b14e
font_02_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 10928 bytes
SHA-256: 4f36809e6f09dcd8dfc87b420208ffbc8999b35f97de1e24fa15ca24fdf98883