Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad08eca360e65211…

MALICIOUS

PDF

89.3 KB Created: 2021-04-08 01:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fc9ddc6e66372728f83b402abff77f4d SHA-1: ffd9c57c4c091ec3b7feff4f2048c5d83266b97b SHA-256: ad08eca360e652113f6ae1ef2e287c22c11a3ae842dc97a62d78e764935b5001
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several heuristics flagging it as a link farm and a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://dafemum.ru/wix?keyword=codex+magica+pdf+indonesia+download In PDF document text
    • http://shop-onlain.fun/435219986913r9tb.pdfIn PDF document text
    • http://sarkife.site/jump_ball_rules_basketballprjs9.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/fISbicJ/37087050641.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/zetev-girerubisubipaw-jewebofarej.pdfIn PDF document text
    • https://munojafejim.weebly.com/uploads/1/3/0/8/130874523/c649072a42b514.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/gdSvPje/42539506617.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/xugagoxizop.pdfIn PDF document text
    • http://idealslimitaly.site/lds_come_follow_me_primary_manual_2020iyk5f.pdfIn PDF document text
    • http://kolejuf.iblogger.org/99679245161.pdfIn PDF document text
    • http://copyrightnotices-form.com/472812295040ihrp.pdfIn PDF document text
    • https://tolonatapuxid.weebly.com/uploads/1/3/4/0/134042297/008e21711.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/b8fcddc320b8.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/9298285.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/pidapidifireb_raropilotexa_vekamekabomamej.pdfIn PDF document text
    • https://fowuxodujokuk.weebly.com/uploads/1/3/4/3/134310829/muvumarigumivu_rarox_sivenagepotip.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/ghjigip/11236082663.pdfIn PDF document text
    • https://nasoxuxelaleve.weebly.com/uploads/1/3/4/7/134744481/0c810.pdfIn PDF document text
    • http://natfreshik.fun/tumeganalejupaj73p7r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bemogabidemixu.epizy.com/seamless_pipe_weight_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/pubuguxujimifipab.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/60047146459.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/masuvitupisiretizevo.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/3937855832.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/michelin_star_guide_usa.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_off0001101f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101F 5272 bytes
SHA-256: 062aad2ac0faa2beb26736a79972e19422f479299343abb5e70dd4a0b121111d
font_01_sfnt_off00012217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 11552 bytes
SHA-256: 3e93bcfbfea7400064129bc1efec927c186e0b4ffd01c14ee9091672616ebe58
font_02_sfnt_off00014921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14921 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34