Malicious PDF — malware analysis report

Static analysis result for SHA-256 affde878725aebb2…

MALICIOUS

PDF

115.1 KB Created: 2021-03-09 23:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 09190dcd0726afee9e919d72a0b9a3e6 SHA-1: d40536cc3242cedbced59872d34928fa44b7d901 SHA-256: affde878725aebb2ff84109158f9dae45aa5df99af1b0cfa1454be6976b2c6a0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/award?keyword=cours+grammaire+fran%25C3%25A7aise+pdf+gratuit PDF link annotation
    • https://refefutetolesom.weebly.com/uploads/1/3/4/8/134868450/matowuriv-belakilamazi.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/4841111.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/lajuxasabu.pdfIn PDF document text
    • http://ersoil.fun/rajesh_cherthala_flute_mp3_free_download474sg.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hDbhfhf/nascar_mobile_app_review.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/mesasoj-pegovetenewe-gaxozofot.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/jfjgjh7/ludo_online_game_win_cash.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/2075055.pdfIn PDF document text
    • http://bullbananavannaone.xyz/mezimdjo99.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/6769676.pdfIn PDF document text
    • https://sizonijuza.weebly.com/uploads/1/3/4/5/134594560/8198317.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/bhedeie/space_simulator_free_ios.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/fffdf.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/samsung_scx-4623_series_scanner_softwarejurnc.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/ighaShf/25859627198.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
    • https://s3.amazonaws.com/kovilowab/logitech_z-5500_subwoofer_frequency.pdfIn PDF document text
    • http://gegapitigiz.rf.gd/31206631779.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/prezi_powerpoint_presentation_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/clash_royale_free_apkpure.pdfIn PDF document text
    • http://mugudupo.epizy.com/xutiperavovoreguremuv.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/henry_v_shakespeare.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/alderwood_middle_school_sports_physical_form.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_off000166f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F6 5416 bytes
SHA-256: 42a6a95c76725d1d74898a5f80a02bdf73243b2fe95c3a86f1ce1f15ed68016e
font_01_sfnt_off00017951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17951 17872 bytes
SHA-256: 0c8dccbea5644c6bcf2c4fe1d3f9a8aa7feb59fec1037a96faf2f8312a4b55da
font_02_sfnt_off0001ae98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE98 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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